P25AF Code - Coolant Temperature Control Module Requested MIL Illumination
Quick Answer
Control modules constantly monitor the vehicle for any condition which may adversely affect vehicle performance. Common causes include Check Coolant Temperature Control Module for codes, Faulty Coolant Temperature Control Module. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P25AF indicates Coolant Temperature Control Module Requested MIL Illumination.
- Common causes
- Common causes include Check Coolant Temperature Control Module for codes, Faulty Coolant Temperature Control Module.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P25AF Description
The DTC will be set when the ECM receives a serial data message from the Coolant Temperature Control Module indicating that DTC has been set in the module.
What are the Possible Causes of the DTC P25AF?
- Check Coolant Temperature Control Module for codes
- Faulty Coolant Temperature Control Module
How to Fix the DTC P25AF?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P25AF code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Information for Specific Makes
- P25AF Buick — Coolant Temperature Control Module Requested MIL Illumination
- P25AF Cadillac — Coolant Temperature Control Module Requested MIL Illumination
- P25AF Chevrolet — Coolant Temperature Control Module Requested MIL Illumination
- P25AF GMC — Coolant Temperature Control Module Requested MIL Illumination
Frequently Asked Questions about P25AF Code
1. What are the common symptoms of OBDII code P25AF?
- Common symptoms include the malfunction indicator lamp (MIL) or check engine light illuminating on the dashboard and potential issues with the coolant temperature control system.
2. What does the OBDII code P25AF indicate?
- The code P25AF indicates a problem with the Coolant Temperature Control Module Requested MIL Illumination, which is a module that controls the coolant temperature in the engine.
3. What are possible causes of OBDII code P25AF?
- Possible causes include a faulty coolant temperature control module, wiring issues, a defective engine coolant temperature sensor, or problems with the vehicle's computer system.
4. How serious is OBDII code P25AF?
- While the code itself may not indicate a critical issue with the vehicle's drivability, it is important to address it promptly to prevent potential damage to the engine or emissions system.
5. Can I continue driving with OBDII code P25AF?
- It is generally not recommended to continue driving with the code present, as unresolved issues with the coolant temperature control system can lead to overheating or other engine problems.
6. How can I diagnose and repair OBDII code P25AF?
- Diagnosis typically involves using a scan tool to read the code, checking the coolant temperature control module and related components for faults, and addressing any identified issues through repairs or replacements.
7. Will resetting the OBDII code P25AF make it go away permanently?
- Simply resetting the code may temporarily turn off the MIL light, but if the underlying issue is not addressed, the code is likely to reappear once the problem is detected again by the vehicle's system.
8. How much does it cost to fix OBDII code P25AF?
- Repair costs can vary depending on the specific cause of the code, the extent of the issue, and labor rates in your area. It is recommended to consult with a professional mechanic for an accurate estimate.
9. Can a DIY enthusiast fix OBDII code P25AF at home?
- Depending on your skill level and access to tools, some DIY enthusiasts may be able to diagnose and repair simple issues related to the code, but more complex problems may require professional assistance.
10. Is it necessary to pass an emissions test with OBDII code P25AF present?
- In most regions, vehicles with an illuminated MIL light will not pass an emissions test. It is important to address the code and ensure the vehicle is in proper working condition before attempting to pass any required tests.
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