DTC DETECTION LOGIC AND CONDITIONS [13B-MSP]

DTC No.	Condition	Detection condition
B1342	PCM malfunction	• Malfunction in the PCM internal circuit.
P0030	A/F sensor heater control circuit problem	• The PCM monitors the A/F sensor impedance when under the A/F sensor heater control for 190 s. If the impedance is more than 44 ohms while PCM turns A/F sensor heater on, the PCM determines that there is a A/F sensor heater control circuit problem.
P0031	A/F sensor heater control circuit low input	• The input voltage to the A/F sensor heater drive terminal in the PCM is at the set value or less for 1 s or more even though the A/F sensor heater is duty-controlled at under 90% by the PCM.
P0032	A/F sensor heater control circuit high input	• The input voltage to the A/F sensor heater drive terminal in the PCM is at the set value or more for 1 s or more even though the A/F sensor heater is duty-controlled at 10% or more by the PCM.
P0037	HO2S heater control circuit low input	• The input voltage to the HO2S heater drive terminal in the PCM is at the set value or less for 0.5 s or more even though the HO2S heater is duty-controlled at under 90 % by the PCM.
P0038	HO2S heater control circuit high input	• The input voltage to the HO2S heater drive terminal in the PCM is at the set value or more for 0.5 s or more even though the HO2S heater is duty-controlled at 10 % or more by the PCM.
P0076*¹	VDI solenoid valve control circuit low input	• The PCM monitors the VDI solenoid valve control voltage when the PCM turns the VDI solenoid valve off. If the control voltage is low, the PCM determines that the VDI solenoid valve control circuit voltage is low.
P0077*¹	VDI solenoid valve control circuit high input	• The PCM monitors the VDI solenoid valve control voltage when the PCM turns the VDI solenoid valve on. If the control voltage is high, the PCM determines that the VDI solenoid valve control circuit voltage is high.
P0101	MAF sensor circuit range/performance problem	• The PCM compares the actual MAF amount with the expected MAF amount when the engine is running. ― If the throttle opening angle is more than 50% and the MAF amount is less than 9 g/s {1.2 lb/min} (less than 1.4 V), the PCM determines that there is a MAF sensor circuit range/performance problem. ― If the ECT is more than 70 °C {158 °F}, the engine speed is less than 2,000 rpm and the MAF amount is more than 65 g/s {8.6 lb/min} (more than 2.8 V), the PCM determines that there is a MAF sensor circuit range/performance problem.
P0102	MAF sensor circuit low input	• The PCM monitors the input voltage from the MAF sensor when the engine is running. If the input voltage is less than 0.64 V, the PCM determines that the MAF sensor circuit input voltage is low.
P0103	MAF sensor circuit high input	• The PCM monitors the input voltage from the MAF sensor when the engine is running. If the input voltage is more than 5.0 V, the PCM determines that the MAF sensor circuit input voltage is high.
P0107	BARO sensor circuit low input	• The PCM monitors the input voltage from the BARO sensor when the engine is running. If the input voltage is less than 2.09 V, the PCM determines that the BARO sensor circuit input voltage is low.
P0108	BARO sensor circuit high input	• The PCM monitors the input voltage from the BARO sensor when the engine is running. If the input voltage is more than 4.02 V, the PCM determines that the BARO sensor circuit input voltage is high.
P0112	IAT sensor circuit low input	• The PCM monitors the input voltage from the IAT sensor when the engine is running. If the input voltage is less than 0.16 V, the PCM determines that the IAT sensor circuit input voltage is low.
P0113	IAT sensor circuit high input	• The PCM monitors the input voltage from the IAT sensor when the engine is running. If the input voltage is more than 4.8 V, the PCM determines that the IAT sensor circuit input voltage is high.
P0117	ECT sensor circuit low input	• The PCM monitors the input voltage from the ECT sensor when the engine is running. If the input voltage is less than 0.2 V, the PCM determines that the ECT sensor circuit input voltage is low.
P0118	ECT sensor circuit high input	• The PCM monitors the input voltage from the ECT sensor when the engine is running. If the input voltage is more than 4.8 V, the PCM determines that the ECT sensor circuit input voltage is high.
P0122	TP sensor No.1 circuit low input	• The PCM monitors the input voltage from the TP sensor No.1 when the engine is running. If the input voltage is less than 0.3 V, the PCM determines that the TP sensor No.1 circuit input voltage is low.
P0123	TP sensor No.1 circuit high input	• The PCM monitors the input voltage from the TP sensor No.1 when the engine is running. If the input voltage is more than 4.8 V, the PCM determines that the TP sensor No.1 circuit input voltage is high.
P0130	A/F sensor circuit problem	• The PCM monitors the A/F sensor impedance when under the A/F sensor heater control. If the impedance is more than 500 ohms, the PCM determines that there is a A/F sensor circuit problem.
P0131	A/F sensor circuit low input	• Detect any of the following condition: ― The input voltage to the A/F sensor positive terminal is 1.128 V or less. ― The input voltage to the A/F sensor negative terminal is 0.044 V or less. ― The electric potential difference between the A/F sensor positive and negative terminals is 0 V or less.
P0132	A/F sensor circuit high input	• Detect any of the following condition: ― The input voltage to the A/F sensor positive terminal is 3.589 V or more. ― The input voltage to the A/F sensor negative terminal is 3.541 V or more.
P0133	A/F sensor circuit slow response	• The A/F sensor output signal reacts at a slower timing than expected from the fuel feedback amount. MONITORING CONDITIONS ― A/F sensor heater monitor: completed ― Fuel system loop status: closed loop fuel control ― Engine speed: 1,500—4,000 rpm ― LOAD: 21.7—64.7 %
P0137	HO2S circuit low input	• The PCM monitors input voltage from HO2S. If the input voltage from the HO2S is below 0.1 V for 35.2 s the PCM determines that circuit input is low. MONITORING CONDITIONS ― A/F sensor heater, HO2S heater, A/F sensor, HO2S, and TWC Repair Verification Drive Mode ― Following conditions are met: • Engine speed is above 1,500 rpm. • Engine coolant temperature is above 70 °C {158 °F}. • Fuel injector control in HO2S closed loop control. • The PCM monitors the input voltage from the HO2S when the following conditions are met. Under the following monitoring conditions, if the input voltage from the HO2S does not even exceed 0.1 V though the short term fuel trim is controlled, the PCM determines that sensor circuit input is low. MONITORING CONDITIONS ― A/F sensor heater, HO2S heater, A/F sensor, HO2S, and TWC Repair Verification Drive Mode ― Following conditions are met for above 20.8 s: • Engine speed is above 1,500 rpm. • Engine coolant temperature is above 70 °C {158 °F}.
P0138	HO2S circuit high input	• The PCM monitors the input voltage from the HO2S when the engine is running. If the input voltage is more than 1.2 V, the PCM determines that the HO2S circuit voltage is high.
P0139	HO2S circuit slow response	• The PCM monitors the HO2S inversion cycle period and rich-to-lean response time while under the open loop fuel control (fuel cut off control). If the average response time is more than the specification, the PCM determines that the HO2S circuit response is slow.
P0171	System too lean	• The PCM monitors the short term fuel trim (SHRTFT) and long term fuel trim (LONGFT) when under closed loop fuel control. If the fuel trim is more than the specification, the PCM determines that the system is too lean.
P0172	System too rich	• The PCM monitors the short term fuel trim (SHRTFT) and long term fuel trim (LONGFT) when under closed loop fuel control. If the fuel trim is less than the specification, the PCM determines that the system is too rich.
P0222	TP sensor No.2 circuit low input	• The PCM monitors the input voltage from the TP sensor No.2 when the engine is running. If the input voltage is less than 0.7 V, the PCM determines that the TP sensor No.2 circuit input voltage is low.
P0223	TP sensor No.2 circuit high input	• The PCM monitors the input voltage from the TP sensor No.2 when the engine is running. If the input voltage is more than 4.8 V, the PCM determines that the TP sensor No.2 circuit input voltage is high.
P0300	Random misfire detected	• The PCM monitors the eccentric shaft position sensor input signal interval time. The PCM calculates the change of the interval time for each rotor. If the change of interval time exceeds the preprogrammed criteria, the PCM detects a misfire in the corresponding rotor. While the engine is running, the PCM counts the number of misfires that occurred at 200 eccentric shaft revolutions and 1,000 eccentric shaft revolutions and calculates the misfire ratio for each eccentric shaft revolution. If the ratio exceeds the preprogrammed criteria, the PCM determines that a misfire, which can damage the catalytic converter or affect emission performance, has occurred.
P0301	Front rotor misfire detected	• The PCM monitors the eccentric shaft position sensor input signal interval time. The PCM calculates the change of the interval time for each rotor. If the change of interval time exceeds the preprogrammed criteria, the PCM detects a misfire in the corresponding rotor. While the engine is running, the PCM counts the number of misfires that occurred at 200 eccentric shaft revolutions and 1,000 eccentric shaft revolutions and calculates the misfire ratio for each eccentric shaft revolution. If the ratio exceeds the preprogrammed criteria, the PCM determines that a misfire, which can damage the catalytic converter or affect emission performance, has occurred.
P0302	Rear rotor misfire detected
P0327	KS No.1 circuit low input	• The PCM monitors the input voltage from the KS No.1 when the engine is running. If the input voltage is less than 1.2 V, the PCM determines that the KS No.1 circuit input voltage is low.
P0328	KS No.1 circuit high input	• The PCM monitors the input voltage from the KS No.1 when the engine is running. If the input voltage is more than 4.0 V, the PCM determines that the KS No.1 circuit input voltage is high.
P0332	KS No.2 circuit low input	• The PCM monitors the input voltage from the KS No.2 when the engine is running. If the input voltage is less than 1.2 V, the PCM determines that the KS No.2 circuit input voltage is low.
P0333	KS No.2 circuit high input	• The PCM monitors the input voltage from the KS No.2 when the engine is running. If the input voltage is more than 4.0 V, the PCM determines that the KS No.2 circuit input voltage is high.
P0335	Eccentric shaft position sensor circuit problem	• The PCM monitors the input signal from the eccentric shaft position sensor when the mass intake airflow amount is more than 2 g/s {0.26 lb/min}. If the input signal is not input, the PCM determines that there is an eccentric shaft position sensor circuit malfunction.
P0336	Eccentric shaft position sensor circuit range/performance problem	• The PCM monitors the input signal from the eccentric shaft position sensor when the engine is running. If the input signal is not the proper pulse pattern, the PCM determines that there is an eccentric shaft position sensor circuit range/performance problem.
P0410	Secondary air injection system problem	• The PCM monitors the A/F sensor output current when the secondary air injection system is operating. If the output current is less than the specification, the PCM determines that there is a secondary air injection system problem.
P0420	Catalyst system efficiency below threshold	• The PCM monitors the input voltage from the HO2S and the A/F sensor output current when the following conditions are met. If the input voltage change is extremely large compared to the output current change, the PCM determines that the catalyst system has deteriorated.
P0443	Purge solenoid valve circuit problem	• Detect any of the following condition: ― The control voltage of the purge solenoid valve is less than specification even though the purge solenoid valve is off. ― The current in the output driver IC over-current detection circuit above 3.5 A even though the purge solenoid valve is ON.
P0480	Cooling fan relay No.1 control circuit problem	• The PCM monitors the cooling fan relay No.1 control voltage when the PCM turns the cooling fan relay No.1 off. If the control voltage is low, the PCM determines that the cooling fan No.1 control circuit voltage is low. ― The PCM monitors the cooling fan relay No.1 control voltage when the PCM turns the cooling fan relay No.1 on. If the control voltage is high, the PCM determines that the cooling fan No.1 control circuit voltage is high.
P0481	Cooling fan relay No.2 and No.3 control circuit problem	• The PCM monitors the cooling fan relay No.2/No.3 control voltage when the PCM turns the cooling fan relay No.2/No.3 off. If the control voltage is low, the PCM determines that the cooling fan No.2/No.3 control circuit voltage is low. • The PCM monitors the cooling fan relay No.2/No.3 control voltage when the PCM turns the cooling fan relay No.2/No.3 on. If the control voltage is high, the PCM determines that the cooling fan No.2/No.3 control circuit voltage is high.
P0482	Cooling fan relay No.4 and No.5 control circuit problem	• The PCM monitors the cooling fan relay No.4/No.5 control voltage when the PCM turns the cooling fan relay No.4/No.5 off. If the control voltage is low, the PCM determines that the cooling fan No.4/No.5 control circuit voltage is low. • The PCM monitors the cooling fan relay No.4/No.5 control voltage when the PCM turns the cooling fan relay No.4/No.5 on. If the control voltage is high, the PCM determines that the cooling fan No.4/No.5 control circuit voltage is high.
P0500	VSS circuit problem	• The PCM monitors the input signal from the vehicle speed sensor when the following conditions are met. If the input signal is less than 3.7 km/h {2.3 mph}, the PCM determines that there is a VSS circuit malfunction. MONITORING CONDITIONS ― Shift lever position: gear is not in neutral position ― Engine speed: more than 2,500 rpm ― LOAD: more than 40.0%
P0505	Idle air control system problem	• The PCM cannot control idle speed at the target idle speed during the KOER self test.
P0522	Oil pressure sensor circuit low input	• The voltage of oil pressure sensor input terminal is less than 0.2 V for 0.5 s or more.
P0523	Oil pressure sensor circuit high input	• The voltage of oil pressure sensor input terminal is more than 4.8 V for 0.5 s or more.
P0562	System voltage low (KAM)	• The PCM monitors the battery voltage when the engine is running. If the voltage is less than 2.5 V, the PCM determines that the system voltage is low.
P0564^*2	Cruise control switch input circuit problem	• The PCM monitors the input voltage from the cruise control switch when the engine is running. If the input voltage is less than 3.0 V for more than 2 min, the PCM determines that there is a cruise control switch input circuit problem.
P0571^*2	Brake switch No.2 input circuit problem	• The PCM monitors switching in conjunction with brake switches No.1 and No.2. If either No.1 or No.2 do not switch for a continuous five times even though either No.1 or No.2 is switched from off to on or from on to off, P0571 is detected.
P0601	PCM memory check sum error	• PCM internal memory check sum error.
P0602	PCM programming error	• No configuration data in the PCM.
P0604	PCM random access memory error	• PCM internal random access memory error.
P0606	PCM processor error	• PCM internal CPU malfunction.
P0610	PCM vehicle options error	• PCM data configuration error.
P0638	Throttle actuator control circuit range/performance problem	• The PCM compares the actual TP with the target TP when the engine is running. If the difference is more than the specification, the PCM determines that there is a throttle actuator control circuit range/performance problem.
P0661	SSV solenoid valve control circuit low	• The PCM monitors the SSV solenoid valve control voltage when the PCM turns the SSV solenoid valve off. If the control voltage is less than 5.8 V, the PCM determines that the SSV solenoid valve control circuit voltage is low.
P0662	SSV solenoid valve control circuit high	• The current in the output driver IC over-current detection circuit above 1.5 A even though the SSV solenoid valve is ON.
P0703	Brake switch No.1 input circuit problem	• The PCM monitors the input signal from the brake switch when the following conditions are met. If the input signal does not change while alternately accelerating and decelerating 8 times, the PCM determines that there is a brake switch input circuit malfunction. MONITORING CONDITIONS ― Vehicle speed: decelerating more than 30 km/h {19 mph} to 0 km/h {0 mph} ― Deceleration: more than 4 km/h {2 mph} pers
P0704*³	CPP switch input circuit problem	• The PCM monitors the input signal from the CPP switch when the vehicle speed is more than 30 km/h {19 mph}. If the input signal does not change while alternately accelerating and decelerating 10 times, the PCM determines that there is a CPP switch input circuit malfunction.
P0850*³	Neutral switch input circuit problem	• The PCM monitors the input signal from the neutral switch when the vehicle is running. If the input signal does not change while alternately running more than 30 km/h {19 mph} 8 times, the PCM determines that there is a neutral switch input circuit malfunction.
P1260	Immobilizer system problem	Vehicle with advanced keyless and start system: • The keyless control module detects an immobilizer system malfunction. Vehicle with keyless entry system: • The instrument cluster detects an immobilizer system malfunction.
P1680	OCV circuit low input	• The PCM monitors input voltage from the OCV. If the voltage of the OCV input terminal is less than the specification for 1 s when the battery voltage is more than 10 V, the PCM determines the OCV circuit voltage is low.
P1681	OCV circuit high input	• The PCM monitors input voltage from the OCV. If the OCV current is more than 3.5 A for 2 s when the battery voltage is more than 10 V, the PCM determines the OCV circuit has a malfunction.
P1682	Metering oil pump No.1 circuit low input	• The PCM monitors the input voltage from the metering oil pump No.1 when the battery voltage is more than 8 V and the metering oil pump No.1 control signal turned from ON to OFF. If the input voltage is less than the specification, the PCM determines that the metering oil pump No.1 circuit has a malfunction.
P1683	Metering oil pump No.1 circuit high input	• The PCM monitors the input voltage from the metering oil pump No.1 when the battery voltage is more than 8 V and the metering oil pump No.1 control signal turned from ON to OFF. If the input voltage is more than the specification, the PCM determines that the metering oil pump No.1 circuit has a malfunction.
P1684	Metering oil pump oil pressure sensor –oil pressure is low	• It is that the oil pressure at the metering oil pump system is less than 40 kPa {0.41 kgf/cm², 5.8 psi} continues for 10 s, after specified period passes after the engine starts.
P1685	Metering oil pump oil pressure sensor –oil pressure is high	• It is that the oil pressure at the metering oil pump system is more than 180 kPa {1.84 kgf/cm², 26.1 psi} continues for 10 s, after specified period passes after the engine starts.
P1686	Metering oil pump No.2 circuit low input	• The PCM monitors the input voltage from the metering oil pump No.2 when the battery voltage is more than 8 V and the metering oil pump No.2 control signal turned from ON to OFF. If the input voltage is less than the specification, the PCM determines that the metering oil pump No.2 circuit has a malfunction.
P1687	Metering oil pump No.2 circuit high input	• The PCM monitors the input voltage from the metering oil pump No.2 when the battery voltage is more than 8 V and the metering oil pump No.2 control signal turned from OFF to ON. If the input voltage is more than the specification, the PCM determines that the metering oil pump No.2 circuit has a malfunction.
P2009	APV motor control circuit low input	• Detect any of the following condition: ― The PCM terminal 2D voltage is not within 3.6 to 4.39 V when the APV motor is operating (open). ― The PCM terminal 2F voltage is not within 3.6 to 4.39 V when the APV motor is operating (closed). ― The PCM terminal 2D, 2F voltage is 4.39 V or more respectively when the APV motor is not operating.
P2010	APV motor control circuit high input	• The PCM monitors the APV motor control current when the engine is running. If the driver IC current is more than 10 A for 5 s, the PCM determines that there is an APV motor control circuit malfunction.
P2096	Target A/F feedback system too lean	• The PCM monitors the target A/F fuel trim when under the target A/F feedback control. If the fuel trim is less than the specification, the PCM determines that the target A/F feedback system is too lean.
P2097	Target A/F feedback system too rich	• The PCM monitors the target A/F fuel trim when under the target A/F feedback control. If the fuel trim is more than the specification, the PCM determines that the target A/F feedback system is too rich.
P2101	Throttle actuator circuit range/performance	• Detect any of the following condition: ― The voltage is not supplied to throttle body even though the drive-by-wire power supply is ON. ― The voltage is supplied to throttle body even though the drive-by-wire power supply is off.
P2107	Throttle actuator control module processor error	• Throttle actuator control module internal processor error.
P2108	Throttle actuator control module performance error	• Throttle actuator control module internal communication error.
P2109	TP sensor minimum stop range/performance problem	• The PCM monitors the minimum TP when the closed TP learning is completed. If the TP is less than 11.5 % or more than 24.3 %, the PCM determines that there is a TP sensor minimum stop range/performance problem.
P2112	Throttle actuator control system range/performance problem	• The PCM monitors the throttle actuator control duty ratio when the engine is running. If the duty ratio is more than 95 %, the PCM determines that there is a throttle actuator control system range/performance problem.
P2119	Throttle actuator control throttle body range/performance problem	• The PCM compares the TP with default TP when the ignition switch is turned off. If the TP is higher than the default TP, the PCM determines that there is a throttle valve return spring malfunction.
P2122	APP sensor No.1 circuit low input	• The PCM monitors the input voltage from the APP sensor No.1 when the engine is running. If the input voltage is less than 0.3 V, the PCM determines that the APP sensor No.1 circuit input voltage is low.
P2123	APP sensor No.1 circuit high input	• The PCM monitors the input voltage from the APP sensor No.1 when the engine is running. If the input voltage is more than 4.8 V, the PCM determines that the APP sensor No.1 circuit input voltage is high.
P2127	APP sensor No.2 circuit low input	• The PCM monitors the input voltage from the APP sensor No.2 when the engine is running. If the input voltage is less than 0.3 V, the PCM determines that the APP sensor No.2 circuit input voltage is low.
P2128	APP sensor No.2 circuit high input	• The PCM monitors the input voltage from the APP sensor No.2 when the engine is running. If the input voltage is more than 4.8 V, the PCM determines that the APP sensor No.2 circuit input voltage is high.
P2135	TP sensor No.1/No.2 voltage correlation problem	• The PCM compares the input voltage from TP sensor No.1 with the input voltage from TP sensor No.2 when the engine is running. If the difference is more than the specification, the PCM determines that there is a TP sensor No.1/No.2 voltage correlation problem.
P2138	APP sensor No.1/No.2 voltage correlation problem	• The PCM compares the input voltage from APP sensor No.1 with the input voltage from APP sensor No.2 when the engine is running. If the difference is more than the specification, the PCM determines that there is a APP sensor No.1/No.2 voltage correlation problem.
P2195	A/F sensor signal stuck lean	• The PCM monitors the A/F sensor output current when the following conditions are met. If the average output current is more than 1.15 A for 25 s, the PCM determines that the A/F sensor signal remains lean. MONITORING CONDITIONS ― ECT: more than 70 °C {158 °F} ― Engine speed: 1,000—3,200 rpm ― MAF amount: 6—80 g/s {0.80—10.58 lb/min} ― Target A/F feedback system status: feedback control ― Input voltage from the HO2S: more than 0.7 V
P2196	A/F sensor signal stuck rich	• The PCM monitors the A/F sensor output current when the following conditions are met. If the average output current is less than 0.85 A for 25 s, the PCM determines that the A/F sensor signal remains rich. MONITORING CONDITIONS ― ECT: more than 70 °C {158 °F} ― Engine speed: 1,000—3,200 rpm ― MAF amount: 6—80 g/s {0.80—10.58 lb/min} ― Target A/F feedback system status: feedback control ― Input voltage from the HO2S: less than 0.2 V
P2257	AIR pump relay control circuit low	• The PCM monitors the AIR pump relay control voltage when the AIR pump is not operating. If the control voltage is less than the specification, the PCM determines that the AIR pump relay control circuit voltage is low.
P2258	AIR pump relay control circuit high	• Detect the 1.5 A or more in the output driver IC over-current detection circuit even though the AIR pump is not operating.
P2259	AIR solenoid valve control circuit low	• The PCM monitors the AIR solenoid valve control voltage when the AIR pump is not operating. If the control voltage is less than 3.5 V, the PCM determines that the AIR solenoid valve control circuit voltage is low.
P2260	AIR solenoid valve control circuit high	• Detect the 3 A or more in the output driver IC over-current detection circuit even though the AIR pump is operating.
P2270	HO2S signal stuck lean	• The PCM monitors the input voltage from the HO2S when the following conditions are met. If the input voltage is less than 0.4 V for 40 s, the PCM determines that the HO2S signal remains lean. MONITORING CONDITIONS ― ECT: more than 70 °C {158 °F} ― Engine speed: more than 1,500 rpm ― MAF amount: more than 10 g/s {1.32 lb/min} ― Short term fuel trim: -20—20% ― Long term fuel trim: -50—50% ― Target A/F feedback system status: feedback control
P2271	HO2S signal stuck rich	• The PCM monitors the input voltage from the HO2S when the following conditions are met. If the input voltage is more than 0.85 V for 40 s, the PCM determines that the HO2S signal remains rich. MONITORING CONDITIONS ― ECT: more than 70 °C {158 °F} ― Engine speed: more than 1,500 rpm ― MAF amount: more than 10 g/s {1.32 lb/min} ― Short term fuel trim: -20—20% ― Long term fuel trim: -50—50% ― Target A/F feedback system status: feedback control
P2299^*4	Accelerator pedal: spring back malfunction	• Brake override system operates.
P2502	Charging system voltage problem	• The PCM monitors the generator output voltage and the battery voltage when the engine is running. If the generator output voltage is more than 16.9 V and the battery voltage is less than 10.9 V, the PCM determines that there is a charging system voltage malfunction.
P2503	Charging system voltage low	• The PCM monitors the generator output voltage when the engine is running. If the generator output voltage is less than 8.5 V while the PCM needs more than 19.5 A from the generator, the PCM determines that the charging system voltage is low.
P2504	Charging system voltage high	• The PCM monitors the generator output voltage and the battery voltage when the engine is running. If the generator output voltage is more than 18.4 V or the battery voltage is more than 15.9 V, the PCM determines that the charging system voltage is high.

DTC No.

Condition

Detection condition

B1342

PCM malfunction

• Malfunction in the PCM internal circuit.

P0030

A/F sensor heater control circuit problem

• The PCM monitors the A/F sensor impedance when under the A/F sensor heater control for 190 s. If the impedance is more than 44 ohms while PCM turns A/F sensor heater on, the PCM determines that there is a A/F sensor heater control circuit problem.

P0031

A/F sensor heater control circuit low input

• The input voltage to the A/F sensor heater drive terminal in the PCM is at the set value or less for 1 s or more even though the A/F sensor heater is duty-controlled at under 90% by the PCM.

P0032

A/F sensor heater control circuit high input

• The input voltage to the A/F sensor heater drive terminal in the PCM is at the set value or more for 1 s or more even though the A/F sensor heater is duty-controlled at 10% or more by the PCM.

P0037

HO2S heater control circuit low input

• The input voltage to the HO2S heater drive terminal in the PCM is at the set value or less for 0.5 s or more even though the HO2S heater is duty-controlled at under 90 % by the PCM.

P0038

HO2S heater control circuit high input

• The input voltage to the HO2S heater drive terminal in the PCM is at the set value or more for 0.5 s or more even though the HO2S heater is duty-controlled at 10 % or more by the PCM.

P0076*¹

VDI solenoid valve control circuit low input

• The PCM monitors the VDI solenoid valve control voltage when the PCM turns the VDI solenoid valve off. If the control voltage is low, the PCM determines that the VDI solenoid valve control circuit voltage is low.

P0077*¹

VDI solenoid valve control circuit high input

• The PCM monitors the VDI solenoid valve control voltage when the PCM turns the VDI solenoid valve on. If the control voltage is high, the PCM determines that the VDI solenoid valve control circuit voltage is high.

P0101

MAF sensor circuit range/performance problem

• The PCM compares the actual MAF amount with the expected MAF amount when the engine is running.

― If the throttle opening angle is more than 50% and the MAF amount is less than 9 g/s {1.2 lb/min} (less than 1.4 V), the PCM determines that there is a MAF sensor circuit range/performance problem.

― If the ECT is more than 70 °C {158 °F}, the engine speed is less than 2,000 rpm and the MAF amount is more than 65 g/s {8.6 lb/min} (more than 2.8 V), the PCM determines that there is a MAF sensor circuit range/performance problem.

P0102

MAF sensor circuit low input

• The PCM monitors the input voltage from the MAF sensor when the engine is running. If the input voltage is less than 0.64 V, the PCM determines that the MAF sensor circuit input voltage is low.

P0103

MAF sensor circuit high input

• The PCM monitors the input voltage from the MAF sensor when the engine is running. If the input voltage is more than 5.0 V, the PCM determines that the MAF sensor circuit input voltage is high.

P0107

BARO sensor circuit low input

• The PCM monitors the input voltage from the BARO sensor when the engine is running. If the input voltage is less than 2.09 V, the PCM determines that the BARO sensor circuit input voltage is low.

P0108

BARO sensor circuit high input

• The PCM monitors the input voltage from the BARO sensor when the engine is running. If the input voltage is more than 4.02 V, the PCM determines that the BARO sensor circuit input voltage is high.

P0112

IAT sensor circuit low input

• The PCM monitors the input voltage from the IAT sensor when the engine is running. If the input voltage is less than 0.16 V, the PCM determines that the IAT sensor circuit input voltage is low.

P0113

IAT sensor circuit high input

• The PCM monitors the input voltage from the IAT sensor when the engine is running. If the input voltage is more than 4.8 V, the PCM determines that the IAT sensor circuit input voltage is high.

P0117

ECT sensor circuit low input

• The PCM monitors the input voltage from the ECT sensor when the engine is running. If the input voltage is less than 0.2 V, the PCM determines that the ECT sensor circuit input voltage is low.

P0118

ECT sensor circuit high input

• The PCM monitors the input voltage from the ECT sensor when the engine is running. If the input voltage is more than 4.8 V, the PCM determines that the ECT sensor circuit input voltage is high.

P0122

TP sensor No.1 circuit low input

• The PCM monitors the input voltage from the TP sensor No.1 when the engine is running. If the input voltage is less than 0.3 V, the PCM determines that the TP sensor No.1 circuit input voltage is low.

P0123

TP sensor No.1 circuit high input

• The PCM monitors the input voltage from the TP sensor No.1 when the engine is running. If the input voltage is more than 4.8 V, the PCM determines that the TP sensor No.1 circuit input voltage is high.

P0130

A/F sensor circuit problem

• The PCM monitors the A/F sensor impedance when under the A/F sensor heater control. If the impedance is more than 500 ohms, the PCM determines that there is a A/F sensor circuit problem.

P0131

A/F sensor circuit low input

• Detect any of the following condition:

― The input voltage to the A/F sensor positive terminal is 1.128 V or less.

― The input voltage to the A/F sensor negative terminal is 0.044 V or less.

― The electric potential difference between the A/F sensor positive and negative terminals is 0 V or less.

P0132

A/F sensor circuit high input

• Detect any of the following condition:

― The input voltage to the A/F sensor positive terminal is 3.589 V or more.

― The input voltage to the A/F sensor negative terminal is 3.541 V or more.

P0133

A/F sensor circuit slow response

• The A/F sensor output signal reacts at a slower timing than expected from the fuel feedback amount.

MONITORING CONDITIONS

― A/F sensor heater monitor: completed

― Fuel system loop status: closed loop fuel control

― Engine speed: 1,500—4,000 rpm

― LOAD: 21.7—64.7 %

P0137

HO2S circuit low input

• The PCM monitors input voltage from HO2S. If the input voltage from the HO2S is below 0.1 V for 35.2 s the PCM determines that circuit input is low.

MONITORING CONDITIONS

― A/F sensor heater, HO2S heater, A/F sensor, HO2S, and TWC Repair Verification Drive Mode

― Following conditions are met:

• Engine speed is above 1,500 rpm.

• Engine coolant temperature is above 70 °C {158 °F}.

• Fuel injector control in HO2S closed loop control.

• The PCM monitors the input voltage from the HO2S when the following conditions are met. Under the following monitoring conditions, if the input voltage from the HO2S does not even exceed 0.1 V though the short term fuel trim is controlled, the PCM determines that sensor circuit input is low.

MONITORING CONDITIONS

― A/F sensor heater, HO2S heater, A/F sensor, HO2S, and TWC Repair Verification Drive Mode

― Following conditions are met for above 20.8 s:

• Engine speed is above 1,500 rpm.

• Engine coolant temperature is above 70 °C {158 °F}.

P0138

HO2S circuit high input

• The PCM monitors the input voltage from the HO2S when the engine is running. If the input voltage is more than 1.2 V, the PCM determines that the HO2S circuit voltage is high.

P0139

HO2S circuit slow response

• The PCM monitors the HO2S inversion cycle period and rich-to-lean response time while under the open loop fuel control (fuel cut off control). If the average response time is more than the specification, the PCM determines that the HO2S circuit response is slow.

P0171

System too lean

• The PCM monitors the short term fuel trim (SHRTFT) and long term fuel trim (LONGFT) when under closed loop fuel control. If the fuel trim is more than the specification, the PCM determines that the system is too lean.

P0172

System too rich

• The PCM monitors the short term fuel trim (SHRTFT) and long term fuel trim (LONGFT) when under closed loop fuel control. If the fuel trim is less than the specification, the PCM determines that the system is too rich.

P0222

TP sensor No.2 circuit low input

• The PCM monitors the input voltage from the TP sensor No.2 when the engine is running. If the input voltage is less than 0.7 V, the PCM determines that the TP sensor No.2 circuit input voltage is low.

P0223

TP sensor No.2 circuit high input

• The PCM monitors the input voltage from the TP sensor No.2 when the engine is running. If the input voltage is more than 4.8 V, the PCM determines that the TP sensor No.2 circuit input voltage is high.

P0300

Random misfire detected

• The PCM monitors the eccentric shaft position sensor input signal interval time. The PCM calculates the change of the interval time for each rotor. If the change of interval time exceeds the preprogrammed criteria, the PCM detects a misfire in the corresponding rotor. While the engine is running, the PCM counts the number of misfires that occurred at 200 eccentric shaft revolutions and 1,000 eccentric shaft revolutions and calculates the misfire ratio for each eccentric shaft revolution. If the ratio exceeds the preprogrammed criteria, the PCM determines that a misfire, which can damage the catalytic converter or affect emission performance, has occurred.

P0301

Front rotor misfire detected

P0302

Rear rotor misfire detected

P0327

KS No.1 circuit low input

• The PCM monitors the input voltage from the KS No.1 when the engine is running. If the input voltage is less than 1.2 V, the PCM determines that the KS No.1 circuit input voltage is low.

P0328

KS No.1 circuit high input

• The PCM monitors the input voltage from the KS No.1 when the engine is running. If the input voltage is more than 4.0 V, the PCM determines that the KS No.1 circuit input voltage is high.

P0332

KS No.2 circuit low input

• The PCM monitors the input voltage from the KS No.2 when the engine is running. If the input voltage is less than 1.2 V, the PCM determines that the KS No.2 circuit input voltage is low.

P0333

KS No.2 circuit high input

• The PCM monitors the input voltage from the KS No.2 when the engine is running. If the input voltage is more than 4.0 V, the PCM determines that the KS No.2 circuit input voltage is high.

P0335

Eccentric shaft position sensor circuit problem

• The PCM monitors the input signal from the eccentric shaft position sensor when the mass intake airflow amount is more than 2 g/s {0.26 lb/min}. If the input signal is not input, the PCM determines that there is an eccentric shaft position sensor circuit malfunction.

P0336

Eccentric shaft position sensor circuit range/performance problem

• The PCM monitors the input signal from the eccentric shaft position sensor when the engine is running. If the input signal is not the proper pulse pattern, the PCM determines that there is an eccentric shaft position sensor circuit range/performance problem.

P0410

Secondary air injection system problem

• The PCM monitors the A/F sensor output current when the secondary air injection system is operating. If the output current is less than the specification, the PCM determines that there is a secondary air injection system problem.

P0420

Catalyst system efficiency below threshold

• The PCM monitors the input voltage from the HO2S and the A/F sensor output current when the following conditions are met. If the input voltage change is extremely large compared to the output current change, the PCM determines that the catalyst system has deteriorated.

P0443

Purge solenoid valve circuit problem

• Detect any of the following condition:

― The control voltage of the purge solenoid valve is less than specification even though the purge solenoid valve is off.

― The current in the output driver IC over-current detection circuit above 3.5 A even though the purge solenoid valve is ON.

P0480

Cooling fan relay No.1 control circuit problem

• The PCM monitors the cooling fan relay No.1 control voltage when the PCM turns the cooling fan relay No.1 off. If the control voltage is low, the PCM determines that the cooling fan No.1 control circuit voltage is low.

― The PCM monitors the cooling fan relay No.1 control voltage when the PCM turns the cooling fan relay No.1 on. If the control voltage is high, the PCM determines that the cooling fan No.1 control circuit voltage is high.

P0481

Cooling fan relay No.2 and No.3 control circuit problem

• The PCM monitors the cooling fan relay No.2/No.3 control voltage when the PCM turns the cooling fan relay No.2/No.3 off. If the control voltage is low, the PCM determines that the cooling fan No.2/No.3 control circuit voltage is low.

• The PCM monitors the cooling fan relay No.2/No.3 control voltage when the PCM turns the cooling fan relay No.2/No.3 on. If the control voltage is high, the PCM determines that the cooling fan No.2/No.3 control circuit voltage is high.

P0482

Cooling fan relay No.4 and No.5 control circuit problem

• The PCM monitors the cooling fan relay No.4/No.5 control voltage when the PCM turns the cooling fan relay No.4/No.5 off. If the control voltage is low, the PCM determines that the cooling fan No.4/No.5 control circuit voltage is low.

• The PCM monitors the cooling fan relay No.4/No.5 control voltage when the PCM turns the cooling fan relay No.4/No.5 on. If the control voltage is high, the PCM determines that the cooling fan No.4/No.5 control circuit voltage is high.

P0500

VSS circuit problem

• The PCM monitors the input signal from the vehicle speed sensor when the following conditions are met. If the input signal is less than 3.7 km/h {2.3 mph}, the PCM determines that there is a VSS circuit malfunction.

MONITORING CONDITIONS

― Shift lever position: gear is not in neutral position

― Engine speed: more than 2,500 rpm

― LOAD: more than 40.0%

P0505

Idle air control system problem

• The PCM cannot control idle speed at the target idle speed during the KOER self test.

P0522

Oil pressure sensor circuit low input

• The voltage of oil pressure sensor input terminal is less than 0.2 V for 0.5 s or more.

P0523

Oil pressure sensor circuit high input

• The voltage of oil pressure sensor input terminal is more than 4.8 V for 0.5 s or more.

P0562

System voltage low (KAM)

• The PCM monitors the battery voltage when the engine is running. If the voltage is less than 2.5 V, the PCM determines that the system voltage is low.

P0564^*2

Cruise control switch input circuit problem

• The PCM monitors the input voltage from the cruise control switch when the engine is running. If the input voltage is less than 3.0 V for more than 2 min, the PCM determines that there is a cruise control switch input circuit problem.

P0571^*2

Brake switch No.2 input circuit problem

• The PCM monitors switching in conjunction with brake switches No.1 and No.2. If either No.1 or No.2 do not switch for a continuous five times even though either No.1 or No.2 is switched from off to on or from on to off, P0571 is detected.

P0601

PCM memory check sum error

• PCM internal memory check sum error.

P0602

PCM programming error

• No configuration data in the PCM.

P0604

PCM random access memory error

• PCM internal random access memory error.

P0606

PCM processor error

• PCM internal CPU malfunction.

P0610

PCM vehicle options error

• PCM data configuration error.

P0638

Throttle actuator control circuit range/performance problem

• The PCM compares the actual TP with the target TP when the engine is running. If the difference is more than the specification, the PCM determines that there is a throttle actuator control circuit range/performance problem.

P0661

SSV solenoid valve control circuit low

• The PCM monitors the SSV solenoid valve control voltage when the PCM turns the SSV solenoid valve off. If the control voltage is less than 5.8 V, the PCM determines that the SSV solenoid valve control circuit voltage is low.

P0662

SSV solenoid valve control circuit high

• The current in the output driver IC over-current detection circuit above 1.5 A even though the SSV solenoid valve is ON.

P0703

Brake switch No.1 input circuit problem

• The PCM monitors the input signal from the brake switch when the following conditions are met. If the input signal does not change while alternately accelerating and decelerating 8 times, the PCM determines that there is a brake switch input circuit malfunction.

MONITORING CONDITIONS

― Vehicle speed: decelerating more than 30 km/h {19 mph} to 0 km/h {0 mph}

― Deceleration: more than 4 km/h {2 mph} pers

P0704*³

CPP switch input circuit problem

• The PCM monitors the input signal from the CPP switch when the vehicle speed is more than 30 km/h {19 mph}. If the input signal does not change while alternately accelerating and decelerating 10 times, the PCM determines that there is a CPP switch input circuit malfunction.

P0850*³

Neutral switch input circuit problem

• The PCM monitors the input signal from the neutral switch when the vehicle is running. If the input signal does not change while alternately running more than 30 km/h {19 mph} 8 times, the PCM determines that there is a neutral switch input circuit malfunction.

P1260

Immobilizer system problem

Vehicle with advanced keyless and start system:

• The keyless control module detects an immobilizer system malfunction.

Vehicle with keyless entry system:

• The instrument cluster detects an immobilizer system malfunction.

P1680

OCV circuit low input

• The PCM monitors input voltage from the OCV. If the voltage of the OCV input terminal is less than the specification for 1 s when the battery voltage is more than 10 V, the PCM determines the OCV circuit voltage is low.

P1681

OCV circuit high input

• The PCM monitors input voltage from the OCV. If the OCV current is more than 3.5 A for 2 s when the battery voltage is more than 10 V, the PCM determines the OCV circuit has a malfunction.

P1682

Metering oil pump No.1 circuit low input

• The PCM monitors the input voltage from the metering oil pump No.1 when the battery voltage is more than 8 V and the metering oil pump No.1 control signal turned from ON to OFF. If the input voltage is less than the specification, the PCM determines that the metering oil pump No.1 circuit has a malfunction.

P1683

Metering oil pump No.1 circuit high input

• The PCM monitors the input voltage from the metering oil pump No.1 when the battery voltage is more than 8 V and the metering oil pump No.1 control signal turned from ON to OFF. If the input voltage is more than the specification, the PCM determines that the metering oil pump No.1 circuit has a malfunction.

P1684

Metering oil pump oil pressure sensor –oil pressure is low

• It is that the oil pressure at the metering oil pump system is less than 40 kPa {0.41 kgf/cm², 5.8 psi} continues for 10 s, after specified period passes after the engine starts.

P1685

Metering oil pump oil pressure sensor –oil pressure is high

• It is that the oil pressure at the metering oil pump system is more than 180 kPa {1.84 kgf/cm², 26.1 psi} continues for 10 s, after specified period passes after the engine starts.

P1686

Metering oil pump No.2 circuit low input

• The PCM monitors the input voltage from the metering oil pump No.2 when the battery voltage is more than 8 V and the metering oil pump No.2 control signal turned from ON to OFF. If the input voltage is less than the specification, the PCM determines that the metering oil pump No.2 circuit has a malfunction.

P1687

Metering oil pump No.2 circuit high input

• The PCM monitors the input voltage from the metering oil pump No.2 when the battery voltage is more than 8 V and the metering oil pump No.2 control signal turned from OFF to ON. If the input voltage is more than the specification, the PCM determines that the metering oil pump No.2 circuit has a malfunction.

P2009

APV motor control circuit low input

• Detect any of the following condition:

― The PCM terminal 2D voltage is not within 3.6 to 4.39 V when the APV motor is operating (open).

― The PCM terminal 2F voltage is not within 3.6 to 4.39 V when the APV motor is operating (closed).

― The PCM terminal 2D, 2F voltage is 4.39 V or more respectively when the APV motor is not operating.

P2010

APV motor control circuit high input

• The PCM monitors the APV motor control current when the engine is running. If the driver IC current is more than 10 A for 5 s, the PCM determines that there is an APV motor control circuit malfunction.

P2096

Target A/F feedback system too lean

• The PCM monitors the target A/F fuel trim when under the target A/F feedback control. If the fuel trim is less than the specification, the PCM determines that the target A/F feedback system is too lean.

P2097

Target A/F feedback system too rich

• The PCM monitors the target A/F fuel trim when under the target A/F feedback control. If the fuel trim is more than the specification, the PCM determines that the target A/F feedback system is too rich.

P2101

Throttle actuator circuit range/performance

• Detect any of the following condition:

― The voltage is not supplied to throttle body even though the drive-by-wire power supply is ON.

― The voltage is supplied to throttle body even though the drive-by-wire power supply is off.

P2107

Throttle actuator control module processor error

• Throttle actuator control module internal processor error.

P2108

Throttle actuator control module performance error

• Throttle actuator control module internal communication error.

P2109

TP sensor minimum stop range/performance problem

• The PCM monitors the minimum TP when the closed TP learning is completed. If the TP is less than 11.5 % or more than 24.3 %, the PCM determines that there is a TP sensor minimum stop range/performance problem.

P2112

Throttle actuator control system range/performance problem

• The PCM monitors the throttle actuator control duty ratio when the engine is running. If the duty ratio is more than 95 %, the PCM determines that there is a throttle actuator control system range/performance problem.

P2119

Throttle actuator control throttle body range/performance problem

• The PCM compares the TP with default TP when the ignition switch is turned off. If the TP is higher than the default TP, the PCM determines that there is a throttle valve return spring malfunction.

P2122

APP sensor No.1 circuit low input

• The PCM monitors the input voltage from the APP sensor No.1 when the engine is running. If the input voltage is less than 0.3 V, the PCM determines that the APP sensor No.1 circuit input voltage is low.

P2123

APP sensor No.1 circuit high input

• The PCM monitors the input voltage from the APP sensor No.1 when the engine is running. If the input voltage is more than 4.8 V, the PCM determines that the APP sensor No.1 circuit input voltage is high.

P2127

APP sensor No.2 circuit low input

• The PCM monitors the input voltage from the APP sensor No.2 when the engine is running. If the input voltage is less than 0.3 V, the PCM determines that the APP sensor No.2 circuit input voltage is low.

P2128

APP sensor No.2 circuit high input

• The PCM monitors the input voltage from the APP sensor No.2 when the engine is running. If the input voltage is more than 4.8 V, the PCM determines that the APP sensor No.2 circuit input voltage is high.

P2135

TP sensor No.1/No.2 voltage correlation problem

• The PCM compares the input voltage from TP sensor No.1 with the input voltage from TP sensor No.2 when the engine is running. If the difference is more than the specification, the PCM determines that there is a TP sensor No.1/No.2 voltage correlation problem.

P2138

APP sensor No.1/No.2 voltage correlation problem

• The PCM compares the input voltage from APP sensor No.1 with the input voltage from APP sensor No.2 when the engine is running. If the difference is more than the specification, the PCM determines that there is a APP sensor No.1/No.2 voltage correlation problem.

P2195

A/F sensor signal stuck lean

• The PCM monitors the A/F sensor output current when the following conditions are met. If the average output current is more than 1.15 A for 25 s, the PCM determines that the A/F sensor signal remains lean.

MONITORING CONDITIONS

― ECT: more than 70 °C {158 °F}

― Engine speed: 1,000—3,200 rpm

― MAF amount: 6—80 g/s {0.80—10.58 lb/min}

― Target A/F feedback system status: feedback control

― Input voltage from the HO2S: more than 0.7 V

P2196

A/F sensor signal stuck rich

• The PCM monitors the A/F sensor output current when the following conditions are met. If the average output current is less than 0.85 A for 25 s, the PCM determines that the A/F sensor signal remains rich.

MONITORING CONDITIONS

― ECT: more than 70 °C {158 °F}

― Engine speed: 1,000—3,200 rpm

― MAF amount: 6—80 g/s {0.80—10.58 lb/min}

― Target A/F feedback system status: feedback control

― Input voltage from the HO2S: less than 0.2 V

P2257

AIR pump relay control circuit low

• The PCM monitors the AIR pump relay control voltage when the AIR pump is not operating. If the control voltage is less than the specification, the PCM determines that the AIR pump relay control circuit voltage is low.

P2258

AIR pump relay control circuit high

• Detect the 1.5 A or more in the output driver IC over-current detection circuit even though the AIR pump is not operating.

P2259

AIR solenoid valve control circuit low

• The PCM monitors the AIR solenoid valve control voltage when the AIR pump is not operating. If the control voltage is less than 3.5 V, the PCM determines that the AIR solenoid valve control circuit voltage is low.

P2260

AIR solenoid valve control circuit high

• Detect the 3 A or more in the output driver IC over-current detection circuit even though the AIR pump is operating.

P2270

HO2S signal stuck lean

• The PCM monitors the input voltage from the HO2S when the following conditions are met. If the input voltage is less than 0.4 V for 40 s, the PCM determines that the HO2S signal remains lean.

MONITORING CONDITIONS

― ECT: more than 70 °C {158 °F}

― Engine speed: more than 1,500 rpm

― MAF amount: more than 10 g/s {1.32 lb/min}

― Short term fuel trim: -20—20%

― Long term fuel trim: -50—50%

― Target A/F feedback system status: feedback control

P2271

HO2S signal stuck rich

• The PCM monitors the input voltage from the HO2S when the following conditions are met. If the input voltage is more than 0.85 V for 40 s, the PCM determines that the HO2S signal remains rich.

MONITORING CONDITIONS

― ECT: more than 70 °C {158 °F}

― Engine speed: more than 1,500 rpm

― MAF amount: more than 10 g/s {1.32 lb/min}

― Short term fuel trim: -20—20%

― Long term fuel trim: -50—50%

― Target A/F feedback system status: feedback control

P2299^*4

Accelerator pedal: spring back malfunction

• Brake override system operates.

P2502

Charging system voltage problem

• The PCM monitors the generator output voltage and the battery voltage when the engine is running. If the generator output voltage is more than 16.9 V and the battery voltage is less than 10.9 V, the PCM determines that there is a charging system voltage malfunction.

P2503

Charging system voltage low

• The PCM monitors the generator output voltage when the engine is running. If the generator output voltage is less than 8.5 V while the PCM needs more than 19.5 A from the generator, the PCM determines that the charging system voltage is low.

P2504

Charging system voltage high

• The PCM monitors the generator output voltage and the battery voltage when the engine is running. If the generator output voltage is more than 18.4 V or the battery voltage is more than 15.9 V, the PCM determines that the charging system voltage is high.