DTC P0125: Insufficient Coolant Temperature For Closed Loop Operation: Condition
WARNING: This page is about a different car, the 2002 Suzuki Esteem. However, it is still accessible from the selected car via links, so may be relevant.
DTC is set when engine coolant temperature fails to reach predetermined level, allowing for closed loop operation, after vehicle has been driven for a specified time. MIL is illuminated when Engine Control Module (ECM) detects malfunction during 2 consecutive drive cycles. Possible causes are:
- ECT sensor malfunction.
- ECT sensor circuit malfunction.
- Thermostat malfunction.
- ECM malfunction.