DTC P2122

APP sensor No.1 circuit low input

DETECTION CONDITION

• The PCM monitors the input voltage from APP sensor No.1 when the engine is running. If the input voltage is less than 0.35 V, the PCM determines that the APP sensor No.1 circuit input voltage is low.

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.

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

• FREEZE FRAME DATA is available.

• The DTC is stored in the PCM memory.

POSSIBLE CAUSE

• APP sensor No.1 malfunction

• Connector or terminal malfunction

• Open circuit in wiring harness between APP sensor terminal D and PCM terminal 1AL

• Short to ground in wiring harness between APP sensor terminal D and PCM terminal 1AL

• Open circuit in wiring harness between APP sensor terminal F and PCM terminal 1AO

• Short to ground in wiring harness between APP sensor terminal F and PCM terminal 1AO

• PCM malfunction

STEP

INSPECTION

ACTION

1

• Has FREEZE FRAME DATA been recorded?

Yes

Go to the next step.

No

Record the FREEZE FRAME DATA on the repair order, then go to the next step.

2

• Verify related Service Bulletins and/or on-line repair information availability.

• Is any related repair information available?

Yes

Perform repair or diagnosis according to the available repair information.

• If the vehicle is not repaired, go to the next step.

No

Go to the next step.

3

• 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 8.

No

Go to the next step.

4

• Turn the ignition switch off.

• Inspect for continuity between the following terminals and body ground:

• APP sensor terminal D (wiring harness-side) and body ground

• APP sensor terminal F (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 8.

No

Go to the next step.

5

• Inspect APP sensor No.1.

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

• Is there any malfunction?

Yes

Replace the APP sensor, then go to Step 8.

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

No

Go to the next step.

6

• 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 Step 8.

No

Go to the next step.

7

• Turn the ignition switch off.

• Inspect for continuity between the following terminals:

• APP sensor terminal D (wiring harness-side) and PCM terminal 1AL (wiring harness-side)

• APP sensor terminal F (wiring harness-side) and PCM terminal 1AO (wiring harness-side)

• Is there continuity?

Yes

Go to the next step.

No

Repair or replace the wiring harness for a possible an open circuit, then go to the next step.

8

• 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 [LF].)

No

Go to the next step.

9

• Perform the “AFTER REPAIR PROCEDURE”.

  (See AFTER REPAIR PROCEDURE [LF].)

• Is any DTC present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [LF].)

No

DTC troubleshooting completed.