OBD codes / P0125
P0125
MinorInsufficient Coolant Temperature for Closed-Loop Fuel Control
Usually safe to drive; fix at your convenience.
Likely causes
- stuck-open thermostat
- faulty ECT sensor
- low coolant
Common fixes
- replace the thermostat
- check the ECT sensor and coolant level
Seeing P0125 on your car? Get a diagnosis specific to your exact year, make and model.
Diagnose P0125 for my vehicleGeneric OBD-II reference. Manufacturer-specific behavior varies — confirm with a scan tool and, for safety-related codes, a professional inspection.