P0125: Insufficient Coolant Temperature for Closed Loop Fuel Control
MediumPowertrainCooling System
What does P0125 mean?
P0125 is a diagnostic trouble code indicating "Insufficient Coolant Temperature for Closed Loop Fuel Control". This code relates to your vehicle's cooling system and should be diagnosed to determine the root cause. The severity level helps indicate how urgently this should be addressed.
Symptoms you may notice
- Check engine light (MIL) illuminated on dashboard
- Poor fuel economy
- Rough idle
- Hesitation during acceleration
- Engine overheating
Estimated repair cost
Typical range in Australia (parts + labour)
$100 – $600 AUD
Common causes
- Stuck thermostat (open or closed)
- Low coolant level or coolant leak
- Failed coolant temperature sensor
- Faulty water pump
- Blocked radiator
What should you do?
This code sits in an engine peripheral, typically emissions or forced induction. It will not take braking or steering away, but it can put the car into limp mode, cost you fuel and fail a roadworthy. Book it in rather than clearing it and hoping.
Get a diagnosis for YOUR car
Code P0125 can mean different things depending on your vehicle. TorqueBot gives you a diagnosis specific to your make, model, and year.