DTC P0122 [L3]

BME010200100W12

DTC P0122

TP circuit low input

DETECTION CONDITION

• If PCM detects TP sensor voltage at PCM terminal 2A is below 0.1 V while engine is running, PCM determines that TP circuit has malfunction.
Diagnostic support note
• This is a continuous monitor (CCM).
• MIL illuminates if PCM detects the above malfunction conditions in first drive cycles.
• PENDING CODE is available if PCM detects the above malfunction condition.
• FREEZE FRAME DATA is available.
• DTC is stored in the PCM memory.

POSSIBLE CAUSE

• TP sensor malfunction
• Connector or terminal malfunction
• Open circuit between TP sensor terminal B and PCM terminal 2A
• Short to ground circuit between TP sensor terminal B and PCM terminal 2A
• Open circuit between TP sensor terminal C and PCM terminal 2K

Diagnostic procedure

STEP

INSPECTION

ACTION

1
PERFORM DTC CONFIRMATION PROCEDURE
• Perform DTC CONFIRMATION PROCEDURE.
• Is same DTC present?
Yes
Go to next step.
No
Intermittent concern exists. Go to INTERMITTENT CONCERN TROUBLESHOOTING procedure.
2
CLASSIFY TP SENSOR OR HARNESS MALFUNCTION
• Connect WDS or equivalent.
• Access TP PID.
• Disconnect TP sensor connector.
• Connect a jumper wire between TP sensor terminals B and C (harness-side).
• Is voltage above 4.9 V?
Yes
Go to next step.
No
Go to step 4.
3
INSPECT TP SENSOR CIRCUIT FOR OPEN
• Inspect TP sensor.
• Is TP sensor okay?
Yes
Inspect for poor TP sensor connector terminal C connection. Repair or replace as necessary, then go to Step 7.
No
Replace TP sensor, then go to Step 7.
4
INSPECT POWER SUPPLY CIRCUIT VOLTAGE AT TP SENSOR CONNECTOR
Note
• If DTC P0107 and P2228 are also retrieved with P0122, go to CONSTANT VOLTAGE troubleshooting procedure.
• Turn ignition key to ON (Engine OFF).
• Inspect voltage at TP sensor terminal 2k (harness-side).
• Is voltage within 4.5- 5.5 V?
Yes
Go to next step.
No
Repair or replace open circuit between TP sensor connector terminal C and PCM connector terminal 2K (harness-side).
Then, then go to Step 7.
5
VERIFY TP SIGNAL CIRCUIT FOR OPEN CIRCUIT
• Turn ignition key to OFF.
• Inspect continuity between TP sensor terminal B (harness-side) and PCM terminal 2A.
• Is there continuity?
Yes
Go to next step.
No
Repair or replace suspected harness, then go to Step 7.
6
VERIFY TP SIGNAL CIRCUIT FOR SHORT TO GROUND
• Inspect continuity between TP sensor terminal B (harness-side) and body ground.
• Is there continuity?
Yes
Repair or replace suspected harness, then go to Step 7.
No
Go to next step.
7
VERIFY TROUBLESHOOTING OF DTC P0122 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear DTC from PCM memory using WDS or equivalent.
• Perform KOEO/KOER self-test.
• Is same DTC present?
Yes
Replace PCM, then go to next step.
No
Go to next step.
8
VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
• Is there any DTC present?
Yes
Go to applicable DTC troubleshooting.
No
Troubleshooting completed.