DA100 - DTC 0125: Excessive Time to Enter Closed Loop Control

Diagnostic Trouble Code (DTC) 0125 indicates the ECT sensor has not achieved the required temperature level to enter closed loop operating conditions within a specified amount of time after starting engine.

Possible Causes:
- Leaky or stuck open thermostat.
- Low coolant.

- Check coolant level.

- Is the coolant level fill correct?

YES -- Go to Cooling System for thermostat diagnostics.

NO -- FILL to proper level. COMPLETE PCM reset to clear DTCs. Clearing Diagnostic Trouble Codes

COMPLETE Comprehensive Component Monitor Drive Cycle. Monitors, Trips, Drive Cycles and Readiness Codes

CHECK for DTCs. Diagnostic Subroutines (DSR) - Extracting Codes