DTC P2138 [L8, LF]

DTC P2138	APP sensor No.1/No.2 voltage correlation problem
DETECTION CONDITION	• 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 an APP sensor No.1/No.2 angle correlation problem. Diagnostic support note • This is a continuous monitor (CCM). • The MIL illuminates if the PCM detects the above malfunction condition during the first drive cycle. • FREEZE FRAME DATA (Mode 2/Mode 12) is available. • The DTC is stored in the PCM memory.
POSSIBLE CAUSE	• APP sensor connector or terminals malfunction • PCM connector or terminals malfunction • APP sensor No.1/No.2 malfunction • PCM malfunction

DTC P2138

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

DETECTION CONDITION

• 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 an APP sensor No.1/No.2 angle correlation problem.

Diagnostic support note

• This is a continuous monitor (CCM).

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

• FREEZE FRAME DATA (Mode 2/Mode 12) is available.

• The DTC is stored in the PCM memory.

POSSIBLE CAUSE

• APP sensor connector or terminals malfunction

• PCM connector or terminals malfunction

• APP sensor No.1/No.2 malfunction

• PCM malfunction

STEP	INSPECTION	ACTION
1	VERIFY FREEZE FRAME DATA (MODE 12) HAS BEEN RECORDED • Has the FREEZE FRAME DATA (Mode 12) been recorded?	Yes	Go to the next step.
No	Record the FREEZE FRAME DATA (Mode 12) 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.
No	Go to the next step.
3	INSPECT APP SENSOR CONNECTOR AND TERMINALS • 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 connector or terminals, then go to Step 6.
No	Go to the next step.
4	INSPECT PCM CONNECTOR AND TERMINALS • Disconnect the PCM connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction?	Yes	Repair or replace the connector or terminals, then go to Step 6.
No	Go to the next step.
5	INSPECT APP SENSOR NO.1/NO.2 • Reconnect the APP sensor and PCM connectors. • Inspect the APP sensor No.1/No.2. (See ACCELERATOR PEDAL POSITION (APP) SENSOR INSPECTION [L8, LF].) • Is there any malfunction?	Yes	Replace the APP sensor, then go to the next step. (See ACCELERATOR PEDAL REMOVAL/INSTALLATION [L8, LF].)
No	Go to the next step.
6	VERIFY DTC TROUBLESHOOTING COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. (See AFTER REPAIR PROCEDURE [L8, LF].) • Start the engine and warm it up completely. • Perform the KOEO/KOER self test. (See KOEO/KOER SELF TEST [L8, LF].) • Is the same DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [L8, LF].)
No	Go to the next step.
7	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [L8, LF].) • Are any DTCs present?	Yes	Go to the applicable DTC troubleshooting. (See DTC TABLE [L8, LF].)
No	DTC troubleshooting completed.

STEP

INSPECTION

ACTION

VERIFY FREEZE FRAME DATA (MODE 12) HAS BEEN RECORDED

• Has the FREEZE FRAME DATA (Mode 12) been recorded?

Yes

Go to the next step.

Record the FREEZE FRAME DATA (Mode 12) on the repair order, then go to the next step.

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.

Go to the next step.

INSPECT APP SENSOR CONNECTOR AND TERMINALS

• 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 connector or terminals, then go to Step 6.

Go to the next step.

INSPECT PCM CONNECTOR AND TERMINALS

• Disconnect the PCM connector.

• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).

• Is there any malfunction?

Yes

Repair or replace the connector or terminals, then go to Step 6.

Go to the next step.

INSPECT APP SENSOR NO.1/NO.2

• Reconnect the APP sensor and PCM connectors.

• Inspect the APP sensor No.1/No.2.

(See ACCELERATOR PEDAL POSITION (APP) SENSOR INSPECTION [L8, LF].)

• Is there any malfunction?

Yes

Replace the APP sensor, then go to the next step.

(See ACCELERATOR PEDAL REMOVAL/INSTALLATION [L8, LF].)

Go to the next step.

VERIFY DTC TROUBLESHOOTING COMPLETED

• Make sure to reconnect all disconnected connectors.

• Clear the DTC from the PCM memory using the M-MDS.

(See AFTER REPAIR PROCEDURE [L8, LF].)

• Start the engine and warm it up completely.

• Perform the KOEO/KOER self test.

(See KOEO/KOER SELF TEST [L8, LF].)

• Is the same DTC present?

Yes

Replace the PCM, then go to the next step.

(See PCM REMOVAL/INSTALLATION [L8, LF].)

Go to the next step.

VERIFY AFTER REPAIR PROCEDURE

• Perform the “AFTER REPAIR PROCEDURE”.

(See AFTER REPAIR PROCEDURE [L8, LF].)

• Are any DTCs present?

Yes

Go to the applicable DTC troubleshooting.

(See DTC TABLE [L8, LF].)

DTC troubleshooting completed.