DTC P0125 [L3]

BME010200100236

DTC P0125

Excessive time to enter closed loop fuel control

DETECTION CONDITION

• The PCM monitors ECT sensor signal at PCM terminal 1M after engine is started when cold. If the engine coolant temperature does not reach the expected temperature within specified period, the PCM determines that it has taken an excessive amount of time for the engine coolant temperature to reach the temperature necessary to start closed-loop fuel control.
Diagnostic support note
• This is a continuous monitor (CCM).
• MIL illuminates if PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
• PENDING CODE is available if PCM detects the above malfunction condition during first drive cycle.
• FREEZE FRAME DATA is available.
• DTC is stored in PCM memory.

POSSIBLE CAUSE

• ECT sensor malfunction
• Poor connection of connectors
• PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
• Has FREEZE FRAME DATA been recorded?
Yes
Go to the next step.
No
Record FREEZE FRAME DATA on repair order, then go to the next step.
2
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
• Check for related Service Information availability.
• Is any related Service Information available?
Yes
Perform repair or diagnosis according to available Service Information.
• If vehicle is not repaired, go to the next step.
No
Go to the next step.
3
VERIFY CURRENT INPUT SIGNAL STATUS-IS CONCERN INTERMITTENT OR CONSTANT
• Start the engine.
• Warm up the engine completely.
• Access ECT PID using WDS or equivalent.
• Is ECT PID above 60 °C {140 °F}?
Yes
Intermittent concern exists. Go to INTERMITTENT CONCERNS TROUBLESHOOTING procedure.
No
Go to the next step.
4
INSPECT POOR CONNECTION OF ECT SENSOR CONNECTOR
• Turn the ignition switch off.
• Disconnect the ECT 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.
No
Go to the next step.
5
INSPECT ECT SENSOR
• Inspect the ECT sensor.
• Is it normal?
Yes
Go to the next step.
No
Replace the ECT sensor, then go to Step 7.
6
INSPECT POOR CONNECTION OF PCM CONNECTOR
• Disconnect the PCM connector.
• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
• Is there malfunctions?
Yes
Repair or replace the terminal, then go to the next step.
No
Go to the next step.
7
VERIFY TROUBLESHOOTING OF DTC P0125 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the WDS or equivalent.
• Turn the ignition switch to the ON position (Engine off).
• Access ECT PID using WDS or equivalent.
• Wait until ECT PID below 20 °C {68 °F}.
• Start the engine and warm it up completely.
• Is the PENDING CODE of same DTC present?
Yes
Replace the PCM, then go to the next step.
No
Go to the next step.
8
VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
• Is there any DTC present?
Yes
Go to the applicable DTC inspection.
No
Troubleshooting completed.