P0125

P0125 - Insufficient Coolant Temp for Closed-Loop Fuel Control






For wiring diagrams, refer to.

• When Monitored: With the ignition on, battery voltage greater than 10.4 volts, and no ECT sensor circuit DTCs present.

• Set Condition: The PCM detects that the engine coolant temperature is less than the calibrated pass value when the engine run time is greater than the calibrated value based on start up coolant temperature. Two trip fault. Three good trips to turn off the MIL.






• Always perform the pre-diagnostic troubleshooting procedure before proceeding. Refer to => Non-DTC Based Diagnostics. Pre-Diagnostic Troubleshooting Procedure

Test Step 1 - Checking the Engine Coolant Temperature Sensor Operation

• Diagnose and repair any engine coolant temperature sensor circuit DTCs before proceeding with this test.

• Extremely cold ambient temperatures may cause this DTC to set.

• Perform the diagnostic procedure for Checking the Engine Coolant Temperature Sensor Operation. Refer to => Non-DTC Based Diagnostics. Engine Coolant Temperature Sensor Operation Test

Were any problems found?

Yes

• Repair as necessary.

• Perform the PCM Verification Test. Refer to => Non-DTC
Based Diagnostics. PCM Verification Test

No

• Refer to the checking for an intermittent DTC diagnostic procedure. Refer to => Non-DTC Based Diagnostics. Checking for an Intermittent DTC