DTC P2127 [L3 Turbo]

id0102b7811900

DTC P2127

Accelerator pedal position (APP) sensor No.2 circuit low input

DETECTION CONDITION

•  The PCM monitors the input voltage from APP sensor No.2 when the engine is running. If the input voltage is below 6 V for 1s, the PCM determines that the APP sensor No.2 circuit has malfunction.

Diagnostic support note

•  This is a continuous monitor (CCM).

•  The MIL illuminates if the PCM detects the above malfunction condition in the first drive cycle.

•  PENDING CODE is available if the PCM detects the above malfunction condition.

•  FREEZE FRAME DATA is available.

•  The DTC is stored in the PCM memory.

POSSIBLE CAUSE

•  APP sensor No.2 malfunction

•  Connector or terminal malfunction

•  Short to ground in wiring harness between APP sensor terminal E and PCM terminal 1AC

•  PCM malfunction

DTC P2127	Accelerator pedal position (APP) sensor No.2 circuit low input
DETECTION CONDITION	• The PCM monitors the input voltage from APP sensor No.2 when the engine is running. If the input voltage is below 6 V for 1s, the PCM determines that the APP sensor No.2 circuit has malfunction. Diagnostic support note • This is a continuous monitor (CCM). • The MIL illuminates if the PCM detects the above malfunction condition in the first drive cycle. • PENDING CODE is available if the PCM detects the above malfunction condition. • FREEZE FRAME DATA is available. • The DTC is stored in the PCM memory.
POSSIBLE CAUSE	• APP sensor No.2 malfunction • Connector or terminal malfunction • Short to ground in wiring harness between APP sensor terminal E and PCM terminal 1AC • PCM malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has the FREEZE FRAME DATA been recorded?	Yes	Go to the next step.
1		No	Record FREEZE FRAME DATA 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 the 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	INSPECT APP SENSOR CONNECTOR FOR POOR CONNECTION • Turn the ignition switch off. • Disconnect the APP sensor connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction?	Yes	Repair or replace the terminal, then go to Step 7.
3		No	Go to the next step.
4	INSPECT APP SENSOR NO.2 CIRCUIT FOR SHORT TO ground • Turn the ignition switch off. • Inspect for continuity between the following circuits: ― APP sensor terminal E (wiring harness-side) and body ground • Is there continuity?	Yes	Repair or replace the wiring harness for a possible short to ground, then go to Step 7.
4		No	Go to the next step.
5	INSPECT APP SENSOR NO.2 • Inspect the APP sensor No.2. (See ACCELERATOR PEDAL POSITION (APP) SENSOR INSPECTION[L3 Turbo].) • Is there any malfunction?	Yes	Replace the APP sensor, then go to Step 7. (See ACCELERATOR PEDAL REMOVAL/INSTALLATION[L3 Turbo].)
5		No	Go to the next step.
6	INSPECT PCM CONNECTOR FOR POOR CONNECTION • Turn the ignition switch off. • Disconnect the PCM connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction?	Yes	Repair or replace the terminal, then go to the next step.
6		No	Go to the next step.
7	VERIFY TROUBLESHOOTING OF DTC P2127 COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. • Start the engine. • Is the same DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [L3 Turbo].)
7		No	Go to the next step.
8	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE[L3 Turbo].) • Is any DTC present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE[L3 Turbo].)
8		No	DTC troubleshooting completed.