P0125
Insufficient Coolant Temperature for Closed Loop Fuel Control
Generic code
Fuel and Air Metering
High severity
Moderate repair
Free on OBD DashX
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What P0125 means
- The fault code P0125 indicates that there is a problem with the engine coolant temperature (ECT) sensor or the thermostat. This may cause the engine to run poorly, have reduced power or acceleration, or not start at all.
Possible symptoms
- Illuminated check engine light
- Poor engine performance
- Reduced power or acceleration
- Engine may not start
- Increased emissions
Possible causes
- Failed engine coolant temperature (ECT) sensor
- Stuck open thermostat
- Low engine coolant level
- Faulty wiring or connections in the circuit
- Failed engine control module (ECM)
Related parts
- Engine Coolant Temperature Sensor: The coolant temperature sensor measures the temperature of the engine coolant. Problems lead to engine overheating
Possible solutions
- Replace the engine coolant temperature (ECT) sensor
- Replace the thermostat
- Top off the engine coolant level
- Check and repair any damaged wiring or connections
- Replace the engine control module (ECM) if necessary
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P0125 on OBD DashX
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