P25AF
Coolant Temperature Control Module Requested MIL Illumination
P25AF is an OBD-II diagnostic trouble code meaning: Coolant Temperature Control Module Requested MIL Illumination. Common causes: coolant temperature sensor malfunction, open or short circuit in the sensor circuit. Estimated repair cost: $17–56.
Symptoms
- Malfunction indicator lamp (MIL) is on
- Unstable engine operation
- Engine overheating
- Reduced efficiency of the interior heating system
- Increased fuel consumption
Causes
- Coolant temperature sensor malfunction
- Open or short circuit in the sensor circuit
- Temperature control module malfunction
- Coolant leak
- Thermostat malfunction
How to Fix
- Check coolant level and leaks
- Check the condition and operation of the thermostat
- Check the coolant temperature sensor and its circuit
- Scan the system for additional trouble codes
- If necessary, replace the temperature sensor or control module
Related codes
Error P25AF by Vehicle Brand
FAQ
What does the P25AF code mean?
P25AF is an OBD-II diagnostic trouble code that indicates: Coolant Temperature Control Module Requested MIL Illumination
What causes a P25AF error code?
The most common causes of P25AF include: Coolant temperature sensor malfunction; Open or short circuit in the sensor circuit; Temperature control module malfunction; Coolant leak.
How do I fix a P25AF diagnostic trouble code?
To fix P25AF: Check coolant level and leaks. Check the condition and operation of the thermostat. Check the coolant temperature sensor and its circuit. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P25AF?
Limited driving only, diagnose soon
How much does it cost to fix P25AF?
The estimated repair cost for P25AF is $17–56. Actual cost depends on your vehicle, location, and labor rates.
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