Engine Error
P0125
Insufficient Coolant Temp for Closed Loop Fuel Control
Severity
Low
Symptoms
Reduced fuel economy, poor heater performance, high idle
Common Causes
- Stuck open thermostat
- Low coolant level
- Bad ECT sensor
- Cooling fan issues
How to Fix
- 1 Replace thermostat
- 2 Top off coolant
- 3 Replace ECT sensor
- 4 Inspect cooling fan relay
Estimated Repair Cost
USD
$100
–
$350
Thermostat: $150 - $300; Coolant: $30