DTC P0122:00

TP sensor No.1 circuit low input

DETECTION CONDITION

• If the PCM detects that the TP sensor No.1 voltage at the PCM terminal 1BP is below 0.1 V, the PCM determines that the TP sensor No.1 circuit has a malfunction.

Diagnostic support note

• This is a continuous monitor (CCM).

• The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle.

• FREEZE FRAME DATA/Snapshot data is available.

• DTC is stored in the PCM memory.

FAIL-SAFE FUNCTION

• Restricts the upper limit of the engine speed.

POSSIBLE CAUSE

• Throttle body connector or terminals malfunction

• PCM connector or terminals malfunction

• Short to ground in wiring harness between the following terminals:

• Throttle body terminal B—PCM terminal 1BS

• Throttle body terminal A—PCM terminal 1BP

• TP sensor No.1 signal circuit and ground circuit are shorted to each other

• TP sensor No.1 malfunction

• PCM malfunction

Item (definition)

Unit/Condition

Definition

Condition/Specification (Reference)

TP1

%

Throttle valve position No.1

• Accelerator pedal released: Approx. 21.56%

• Accelerator pedal fully depressed: Approx. 91.37%

V

TP sensor No.1 voltage

• Accelerator pedal released: Approx. 1.07 V

• Accelerator pedal fully depressed: Approx. 4.56 V

STEP

INSPECTION

ACTION

1

NOTE:

• Recording can be facilitated using the screen capture function of the PC.

• Record the FREEZE FRAME DATA/snapshot data on the repair order.

—

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

• Switch the ignition off.

• Disconnect the throttle body connector.

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

• Is there any malfunction?

Yes

Repair or replace the connector and/or terminals, then go to Step 8.

No

Go to the next step.

4

• 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 and/or terminals, then go to Step 8.

No

Go to the next step.

5

• Verify that the throttle body and PCM connectors are disconnected.

• Inspect for continuity between the following terminals (wiring harness-side) and body ground:

• Throttle body terminal B

• Throttle body terminal A

• Is there continuity?

Yes

Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:

• Throttle body terminal B—PCM terminal 1BS

• Throttle body terminal A—PCM terminal 1BP

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to ground.

Go to Step 8.

No

Go to the next step.

6

• Verify that the throttle body and PCM connectors are disconnected.

• Inspect for continuity between throttle body terminals A and D (wiring harness-side).

• Is there continuity?

Yes

Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:

• Throttle body terminal A—PCM terminal 1BP

• Throttle body terminal D—PCM terminal 1BQ

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to each other.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to each other.

Go to Step 8.

No

Go to the next step.

7

• Reconnect all disconnected connectors.

• Inspect the TP sensor No.1.

  (See THROTTLE POSITION (TP) SENSOR INSPECTION [SKYACTIV-G 2.0].)

• Is there any malfunction?

Yes

Replace the throttle body, then go to the next step.

(See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

No

Go to the next step.

8

• Always reconnect all disconnected connectors.

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

  (See AFTER REPAIR PROCEDURE [PCM (SKYACTIV-G 2.0)].)

• Perform the KOEO or KOER self test.

  (See KOEO/KOER SELF TEST [PCM (SKYACTIV-G 2.0)].)

• Is the same DTC present?

Yes

Repeat the inspection from Step 1.

• If the malfunction recurs, replace the PCM.

  (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

Go to the next step.

No

Go to the next step.

9

• Perform the “AFTER REPAIR PROCEDURE”.

  (See AFTER REPAIR PROCEDURE [PCM (SKYACTIV-G 2.0)].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [PCM (SKYACTIV-G 2.0)].)

No

DTC troubleshooting completed.