Powertrain
generic / SAE
P0125
Insufficient Coolant Temperature for Closed Loop Fuel Control
The engine has run long enough that closed-loop fuel control should be active, but the coolant temperature has not risen high enough. Often caused by a stuck-open thermostat or a failed coolant temperature sensor.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number1 / 25
Possible causes
- Thermostat stuck open high
- Coolant temp sensor reading low medium
Inspection / repair
- Difficulty: medium
- DIY: possible
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References
sae:J2012