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P25AF 2015 GMC Sierra Code - Coolant Temperature Control Module Requested MIL Illumination

Quick Answer

The P25AF diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates that the Coolant Temperature Control Module has requested the Malfunction Indicator Lamp (MIL) to illuminate. Common causes include Faulty coolant temperature sensor, Malfunctioning coolant temperature control module, Low coolant level. 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 2015 GMC Sierra indicates Coolant Temperature Control Module Requested MIL Illumination.
Common causes
Common causes include Faulty coolant temperature sensor, Malfunctioning coolant temperature control module, Low coolant level.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 14, 2024
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Code P25AF 2015 GMC Sierra Description

The P25AF diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates that the Coolant Temperature Control Module has requested the Malfunction Indicator Lamp (MIL) to illuminate. This code is typically related to issues with the coolant temperature control system, which plays a crucial role in regulating the engine's operating temperature. When this code is triggered, it means that the control module has detected a problem that could potentially affect the engine's performance and emissions.

OBDII Code P25AF 2015 GMC Sierra - Coolant Temperature Control Module Requested MIL Illumination
P25AF 2015 GMC Sierra Code - Coolant Temperature Control Module Requested MIL Illumination

Common Causes of P25AF 2015 GMC Sierra

  1. Faulty coolant temperature sensor
  2. Malfunctioning coolant temperature control module
  3. Low coolant level
  4. Clogged radiator or cooling system
  5. Electrical issues in the coolant temperature control system

Symptoms of P25AF 2015 GMC Sierra

  1. Illumination of the Check Engine Light
  2. Engine overheating
  3. Poor fuel efficiency
  4. Rough idling or stalling
  5. Reduced engine performance

How to Fix P25AF 2015 GMC Sierra

  1. Diagnose the root cause of the issue by using a diagnostic scanner to retrieve the specific trouble codes and data related to the coolant temperature control system.
  2. Inspect the coolant temperature sensor and replace it if faulty.
  3. Check the coolant level and top it off if low, then inspect for any leaks in the system.
  4. Test the coolant temperature control module for proper operation and replace if necessary.
  5. Flush the cooling system and inspect the radiator for any blockages or restrictions.

Cost to Fix P25AF 2015 GMC Sierra

The cost of repairing a P25AF code on a 2015 GMC Sierra can vary depending on the specific cause of the issue. On average, the cost of parts for this repair can range from $50 to $200, while labor costs can range from $100 to $300. Overall, the total repair cost could fall between $150 and $500. It's important to note that these are rough estimates, and actual costs may vary based on factors such as location, labor rates, and the extent of the repairs needed. It's recommended to consult with a qualified mechanic or auto repair shop for a more accurate cost estimate.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P25AF 2015 GMC Sierra Code

1. What are the common symptoms of OBDII code P25AF in a 2015 GMC Sierra?

- Common symptoms include the Check Engine light illuminating, engine overheating, poor fuel efficiency, and potential issues with the cooling system.

2. What does the OBDII code P25AF indicate in a 2015 GMC Sierra?

- This code indicates a fault with the Coolant Temperature Control Module Requested MIL Illumination system in the vehicle.

3. What are the possible causes of OBDII code P25AF in a 2015 GMC Sierra?

- Possible causes include a faulty coolant temperature control module, wiring issues, coolant temperature sensor problems, or a malfunctioning engine control module.

4. How can I diagnose the OBDII code P25AF in my 2015 GMC Sierra?

- Diagnosis typically involves using an OBDII scanner to retrieve the code, inspecting the coolant temperature control module and sensor, checking the wiring for any damage, and verifying proper coolant levels.

5. Can I continue driving my 2015 GMC Sierra with OBDII code P25AF?

- It is not recommended to drive the vehicle with this code present as it can lead to engine overheating and potential damage. It is best to address the issue promptly.

6. How can I repair OBDII code P25AF in my 2015 GMC Sierra?

- Repair may involve replacing the faulty coolant temperature control module, repairing any damaged wiring, replacing the coolant temperature sensor, or reprogramming the engine control module.

7. Is it possible to reset the OBDII code P25AF in a 2015 GMC Sierra without repairs?

- While clearing the code may temporarily turn off the Check Engine light, it is important to address the underlying issue causing the fault code to prevent further problems.

8. How much does it typically cost to repair OBDII code P25AF in a 2015 GMC Sierra?

- The cost of repair can vary depending on the specific cause of the issue, but it may range from $200 to $500, including parts and labor.

9. Can a DIY enthusiast fix OBDII code P25AF in a 2015 GMC Sierra?

- Depending on the individual's mechanical skills and access to tools, some DIY enthusiasts may be able to address this code by replacing components like the coolant temperature control module or sensor.

10. How often does OBDII code P25AF occur in a 2015 GMC Sierra?

- While not extremely common, this code can occur due to various factors affecting the coolant temperature control system in the vehicle.

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