DTC P0125: Insufficient Coolant Temperature For Closed Loop Operation: Condition
WARNING: This page is about a different car, the 2002 Suzuki Vitara. However, it is still accessible from the selected car via links, so may be relevant.
DTC is set when Engine Control Module (ECM) detects 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 ECM detects malfunction during 2 consecutive drive cycles. Possible causes are:
- ECM malfunction.
- Engine Coolant Temperature (ECT) sensor malfunction.
- ECT sensor circuit malfunction.
- Thermostat malfunction.