Brief Descriptions
MIL Code: 11**Scan Tool Fault Message:
- No Crank Reference Signal at PCM
Description of Trouble Code:
- No crank reference signal detected during engine cranking.
MIL Code: 12*
Scan Tool Fault Message:
- Battery Disconnect
Description of Trouble Code:
- Direct battery input to PCM was disconnected within the last 50 Key-on cycles.
MIL Code: 13**
Scan Tool Fault Message:
- No Change in MAP From Start to Run
Description of Trouble Code:
- No difference recognized between the engine MAP reading and the barometric (atmospheric) pressure reading from start-up.
MIL Code: 14**
Scan Tool Fault Message:
- MAP Sensor Voltage Too Low
Description of Trouble Code:
- MAP sensor input below minimum acceptable voltage.
OR
Scan Tool Fault Message:
- MAP Sensor Voltage Too High
Description of Trouble Code:
- MAP sensor input above maximum acceptable voltage.
OR
Scan Tool Fault Message:
- No 5 Volts to MAP Sensor
Description of Trouble Code:
- MAP sensor output voltage too low for barometric pressure after key off.
MIL Code: 15**
Scan Tool Fault Message:
- No Vehicle Speed Sensor Signal
Description of Trouble Code:
- No vehicle speed sensor signal detected during road load conditions.
MIL Code: 16*
Scan Tool Fault Message:
- Knock Sensor Circuit
Description of Trouble Code:
- No input from knock sensor.
MIL Code: 17**
Scan Tool Fault Message:
- Engine Cold Too Long
Description of Trouble Code:
- Engine does not reach operating temperature within 20 minutes with a vehicle speed signal.
MIL Code: 21**
Scan Tool Fault Message:
- Upstream O2S Shorted to Voltage
Description of Trouble Code:
- Upstream oxygen sensor input voltage maintained above the normal operating range.
OR
Scan Tool Fault Message:
- Upstream 02S Stays at Center
Description of Trouble Code:
- Neither rich or lean condition detected from the upstream oxygen sensor input.
MIL Code: 22**
Scan Tool Fault Message:
- ECT Sensor Voltage Too Low
Description of Trouble Code:
- Engine coolant temperature sensor input below minimum acceptable voltage.
OR
Scan Tool Fault Message:
- ECT Sensor Voltage Too High
Description of Trouble Code:
- Engine coolant temperature sensor input above maximum acceptable voltage.
MIL Code: 23**
Scan Tool Fault Message:
- Intake Air Temp Sensor Voltage Low
Description of Trouble Code:
- Intake air temperature sensor input below the maximum acceptable voltage.
OR
Scan Tool Fault Message:
- Intake Air Temp Sensor Voltage High
Description of Trouble Code:
- Intake air temperature sensor input above the minimum acceptable voltage.
MIL Code: 24**
Scan Tool Fault Message:
- Throttle Position Sensor Voltage Low
Description of Trouble Code:
- Throttle position sensor input below the minimum acceptable voltage.
OR
Scan Tool Fault Message:
- Throttle Position Sensor Voltage High
Description of Trouble Code:
- Throttle position sensor input above the maximum acceptable voltage.
OR
Scan Tool Fault Message:
- No 5 Volts to TPS Sensor
Description of Trouble Code:
- Throttle voltage too low while operating at part throttle.
MIL Code: 25**
Scan Tool Fault Message:
- Idle Air Control Motor Circuits
Description of Trouble Code:
- A shorted or open condition detected in one or more of the idle air control motor circuits.
MIL Code: 27**
Scan Tool Fault Message:
- Injector #1 Control Circuit
Description of Trouble Code:
- Injector #1 does not respond electrically to the control signal.
OR
Scan Tool Fault Message:
- Injector #2 Control Circuit
Description of Trouble Code:
- Injector #2 does not respond electrically to the control signal.
OR
Scan Tool Fault Message:
- Injector #3 Control Circuit
Description of Trouble Code:
- Injector #3 does not respond electrically to the control signal.
OR
Scan Tool Fault Message:
- Injector #4 Control Circuit
Description of Trouble Code:
- Injector #4 does not respond electrically to the control signal.
MIL Code: 31**
Scan Tool Fault Message:
- EVAP Solenoid Circuit
Description of Trouble Code:
- An open or shorted condition detected in the duty cycle purge solenoid circuit.
MIL Code: 32**
Scan Tool Fault Message:
- EGR System failure
Description of Trouble Code:
- Insufficient or excessive change in air/fuel ratio not deflected during diagnostic test.
OR
Scan Tool Fault Message:
- EGR Solenoid Circuit
Description of Trouble Code:
- An open or shorted condition detected in the EGR transducer solenoid circuit.
MIL Code: 33*
Scan Tool Fault Message:
- A/C Clutch Relay Circuit
Description of Trouble Code:
- An open or shorted condition detected in the A/C clutch relay circuit.
OR
Scan Tool Fault Message:
- A/C Pressure Sensor Volts Too High
Description of Trouble Code:
- A/C pressure transducer input above the maximum acceptable voltage.
OR
Scan Tool Fault Message:
- A/C Pressure Sensor Volts Too Low
Description of Trouble Code:
- A/C pressure transducer input below the minimum acceptable voltage.
MIL Code: 34*
Scan Tool Fault Message:
- Speed Control Solenoid Circuits
Description of Trouble Code:
- An open or shorted condition detected in the Speed Control vacuum or vent solenoid circuits.
OR
Scan Tool Fault Message:
- Speed Control Switch Always Low
Description of Trouble Code:
- Speed Control switch input below the minimum acceptable voltage.
OR
Scan Tool Fault Message:
- Speed Control Switch Always High
Description of Trouble Code:
- Speed Control switch input above the maximum acceptable voltage.
MIL Code: 35****
Scan Tool Fault Message:
- High Speed Fan CTRL Relay Circuit
Description of Trouble Code:
- An open or shorted condition detected in the high speed radiator fan relay control circuit.
OR
Scan Tool Fault Message:
- Low Speed Fan CTRL Relay Circuit
Description of Trouble Code:
- An open or shorted condition detectedin the low speed radiator fan relay control circuit.
MIL Code: 41***
Scan Tool Fault Message:
- Generator Field Not Switching Properly
Description of Trouble Code:
- An open or shorted condition detected in the generator field control circuit.
MIL Code: 42*
Scan Tool Fault Message:
- Fuel Pump Relay Control Circuit
Description of Trouble Code:
- An open or shorted condition detected in the fuel pump relay control circuit
OR
Scan Tool Fault Message:
- Auto Shutdown Relay Control Circuit
Description of Trouble Code:
- An open or shorted condition detected in the auto shutdown relay circuit.
OR
Scan Tool Fault Message:
- No ASD Relay Output Voltage at PCM
Description of Trouble Code:
- No ASD output voltage sensed when the ASD relay is energized.
MIL Code: 43****
Scan Tool Fault Message:
- Ignition Coil #1 Primary Circuit
Description of Trouble Code:
- Peak primary circuit current not achieved with maximum dwell.
OR
Scan Tool Fault Message:
- Ignition Coil #2 Primary Circuit
Description of Trouble Code:
- Peak primary circuit current not achieved with maximum dwell.
MIL Code: 44***
Scan Tool Fault Message:
- Ambient Temp Sensor
Description of Trouble Code:
- No ambient temperature sensor input. Also used as an input to the TCM.
MIL Code: 46***
Scan Tool Fault Message:
- Charging System Voltage Too High
Description of Trouble Code:
- Battery voltage sense input above target charging voltage during engine operation.
MIL Code: 47***
Scan Tool Fault Message:
- Charging System Voltage Too Low
Description of Trouble Code:
- Battery voltage sense input below target charging during engine operation. Also, no significant change detected in battery voltage during active test of generator output circuit.
MIL Code: 51**
Scan Tool Fault Message:
- Upstream O2S Stays Below Center (Lean)
Description of Trouble Code:
- A lean air/fuel mixture has been indicated by an abnormally rich correction factor.
MIL Code: 52**
Scan Tool Fault Message:
- Upstream O2S Stays Above Center (Rich)
Description of Trouble Code:
- A rich air/fuel mixture has been indicated by an abnormally lean correction factor.
MIL Code: 53****
Scan Tool Fault Message:
- Internal Controller Failure
Description of Trouble Code:
- PCM Internal fault condition detected.
OR
Scan Tool Fault Message:
- PCM Failure SPI Communications
Description of Trouble Code:
- PCM Internal fault condition detected.
MIL Code: 54*
Scan Tool Fault Message:
- No Cam Signal at PCM
Description of Trouble Code:
- No camshaft signal detected during engine cranking.
MIL Code: 55*
Description of Trouble Code:
- Completion of fault code display on Check Engine lamp.
MIL Code: 62*
Scan Tool Fault Message:
- PCM Failure SRI Mile Not Stored
Description of Trouble Code:
- Unsuccessful attempt to update EMR mileage in the PCM EEPROM.
MIL Code: 63*
Scan Tool Fault Message:
- PCM Failure EEPROM Write Denied
Description of Trouble Code:
- Unsuccessful attempt to write to an EEPROM location by the PCM.
MIL Code: 66*
Scan Tool Fault Message:
- No CCD Message From TCM
Description of Trouble Code:
- No communication from transmission control module.
OR
Scan Tool Fault Message:
- No CCD Message From Body Controller
Description of Trouble Code:
- No communication from body control module.
MIL Code: 71*
Scan Tool Fault Message:
- 5 Volt Output Low
Description of Trouble Code:
- Internal PCM check for 5 volts.
MIL Code: 77*
Scan Tool Fault Message:
- Speed Control Power Circuit
Description of Trouble Code:
- Malfunction detected with power feed to speed control servo solenoids.
* Check Engine Lamp will not illuminate at all times if this Diagnostic Trouble Code was recorded. Cycle Ignition key as described in manual and observe code flashed by Check Engine lamp.
** Check Engine Lamp will illuminate during engine operation if this Diagnostic Trouble Code was recorded.
***Generator Lamp illuminated