DTC P0125 [L3]

BME010200100W14

DTC P0125

Excessive time to enter closed loop fuel control

DETECTION CONDITION

• PCM monitors ECT sensor signal at PCM terminal 1M after engine is started when cold. If engine coolant temperature does not reach the expected temperature within specified period, 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 next step.
No
Record FREEZE FRAME DATA on repair order, then go to 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 next step.
No
Go to next step.
3
VERIFY CURRENT INPUT SIGNAL STATUS-IS CONCERN INTERMITTENT OR CONSTANT
• Start engine.
• Warm up 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 next step.
4
INSPECT POOR CONNECTION OF ECT SENSOR CONNECTOR
• Turn ignition key to OFF.
• Disconnect ECT sensor connector.
• Check for poor connection (damaged, pulled-out pins, corrosion, etc.).
• Is there any malfunction?
Yes
Repair or replace terminal, then go to Step 7.
No
Go to next step.
5
INSPECT ECT SENSOR
• Inspect ECT sensor.
• Is it okay?
Yes
Go to next step.
No
Replace ECT sensor, then go to Step 7.
6
INSPECT POOR CONNECTION OF PCM CONNECTOR
• Disconnect PCM connector.
• Check for poor connection (damaged, pulled-out pins, corrosion, etc.).
• Is there malfunctions?
Yes
Repair or replace terminal, then go to next step.
No
Go to next step.
7
VERIFY TROUBLESHOOTING OF DTC P0125 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear DTC from PCM memory using WDS or equivalent.
• Turn ignition key to ON (Engine OFF).
• Access ECT PID using WDS or equivalent.
• Wait until ECT PID below 20 °C {68 °F}.
• Start engine and warm it up completely.
• Is PENDING CODE of 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.