DTC P0122:00 [L8, LF, L5]

id010242701800

DTC P0122:00

TP sensor No.1 circuit low input

DETECTION CONDITION

•  If the PCM detects that the TP sensor voltage is below 0.2 V while the engine is running, the PCM determines that the TP circuit has a malfunction.

Diagnostic support note

•  This is a continuous monitor (CCM).

•  The MIL illuminates if the PCM detects the above malfunction conditions in first drive cycles.

•  FREEZE FRAME DATA is available.

•  The DTC is stored in the PCM memory.

POSSIBLE CAUSE

•  TP sensor malfunction

•  Connector or terminal malfunction

•  Short to ground in wiring harness between throttle body terminal A and PCM terminal 2AK

•  Open circuit in wiring harness between throttle body terminal B and PCM terminal 2AO

•  PCM malfunction

DTC P0122:00	TP sensor No.1 circuit low input
DETECTION CONDITION	• If the PCM detects that the TP sensor voltage is below 0.2 V while the engine is running, the PCM determines that the TP circuit has a malfunction. Diagnostic support note • This is a continuous monitor (CCM). • The MIL illuminates if the PCM detects the above malfunction conditions in first drive cycles. • FREEZE FRAME DATA is available. • The DTC is stored in the PCM memory.
POSSIBLE CAUSE	• TP sensor malfunction • Connector or terminal malfunction • Short to ground in wiring harness between throttle body terminal A and PCM terminal 2AK • Open circuit in wiring harness between throttle body terminal B and PCM terminal 2AO • PCM malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAS BEEN RECORDED • Has FREEZE FRAME DATA been recorded?	Yes	Go to the next step.
1		No	Record the FREEZE FRAME on the repair order, then go to the next step.
2	VERIFY RELATED SERVICE INFORMATION AVAILABILITY • Verify related Service Information availability. • Is any related Service Information available?	Yes	Perform repair or diagnosis according to the available Service information. If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	CLASSIFY TP SENSOR OR WIRING HARNESS MALFUNCTION • Connect the M-MDS. • Access TP1 PID. • Disconnect throttle body connector. • Connect a jumper wire between throttle body terminals A and B (wiring harness-side). • Is the voltage above 4.9 V?	Yes	Go to the next step.
3		No	Go to Step 5.
4	INSPECT TP SENSOR • Inspect the TP sensor. (See THROTTLE POSITION (TP) SENSOR INSPECTION [L8, LF, L5].) • Is TP sensor okay?	Yes	Inspect throttle body connector terminal B for poor connection. Repair or replace if necessary, then go to Step 8.
4		No	Replace the throttle body, then go to Step 8. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [L8, LF, L5].)
5	INSPECT POWER SUPPLY CIRCUIT VOLTAGE AT THROTTLE BODY CONNECTOR Note • If DTC P0107:00 is also retrieved with P0122:00, go to CONSTANT VOLTAGE troubleshooting procedure. • Switch the ignition to ON. (Engine off) • Measure the voltage at throttle body terminal B (wiring harness-side). • Is the voltage within 4.5— 5.5 V?	Yes	Go to the next step.
5		No	Repair or replace for an open circuit between throttle body connector terminal B (wiring harness-side) and PCM connector terminal 2AO (wiring harness-side). Then, go to Step 8.
6	VERIFY TP1 SIGNAL CIRCUIT FOR OPEN CIRCUIT • Switch the ignition to off. • Inspect for continuity between throttle body terminal A (wiring harness-side) and PCM terminal 2AK (wiring harness-side). • Is there continuity?	Yes	Go to the next step.
6		No	Repair or replace the wiring harness, then go to Step 8.
7	VERIFY TP1 SIGNAL CIRCUIT FOR SHORT TO GROUND • Inspect for continuity between throttle body terminal A (wiring harness-side) and body ground. • Is there continuity?	Yes	Repair or replace the wiring harness, then go to the next step.
7		No	Go to the next step.
8	VERIFY TROUBLESHOOTING OF DTC P0122:00 COMPLETED • Make sure to reconnect all disconnected connectors. • Switch the ignition to ON (Engine off). • Clear the DTC from the PCM memory using the M-MDS. • Start the engine and warm it up completely. • Is the same DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [L8, LF, L5].)
8		No	Go to the next step.
9	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [L8, LF, L5].) • Is any DTC present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [L8, LF, L5].)
9		No	Troubleshooting completed.