Engine-Codes.com
Engine-Codes – GMC – P25AF 2017 GMC Sierra

P25AF 2017 GMC Sierra Code - Coolant Temperature Control Module Requested MIL Illumination

Quick Answer

The P25AF diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates a problem with the Coolant Temperature Control Module Requested MIL Illumination. Common causes include Faulty coolant temperature control module, Wiring issues or electrical connection problems, Malfunctioning engine control module (ECM). 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 2017 GMC Sierra indicates Coolant Temperature Control Module Requested MIL Illumination.
Common causes
Common causes include Faulty coolant temperature control module, Wiring issues or electrical connection problems, Malfunctioning engine control module (ECM).
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
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P25AF 2017 GMC Sierra Description

The P25AF diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates a problem with the Coolant Temperature Control Module Requested MIL Illumination. This code is typically triggered when the engine control module (ECM) detects an issue with the coolant temperature control module, which is responsible for monitoring and regulating the engine's coolant temperature. When this code is set, it means that the module has requested the malfunction indicator lamp (MIL) to illuminate on the vehicle's dashboard to alert the driver of a potential issue.

OBDII Code P25AF 2017 GMC Sierra - Coolant Temperature Control Module Requested MIL Illumination
P25AF 2017 GMC Sierra Code - Coolant Temperature Control Module Requested MIL Illumination

Common Causes of P25AF 2017 GMC Sierra

  1. Faulty coolant temperature control module
  2. Wiring issues or electrical connection problems
  3. Malfunctioning engine control module (ECM)
  4. Defective coolant temperature sensor
  5. Coolant leaks or low coolant levels

Symptoms of P25AF 2017 GMC Sierra

  1. Illumination of the check engine light on the dashboard
  2. Fluctuating or inaccurate coolant temperature readings
  3. Engine overheating or running too cold
  4. Decreased fuel efficiency
  5. Failed emissions test

How to Fix P25AF 2017 GMC Sierra

  1. Diagnose the root cause of the issue using a scan tool to retrieve the DTC and perform a visual inspection of the coolant temperature control module, wiring, and sensor.
  2. Test the coolant temperature control module and sensor for proper operation and replace if necessary.
  3. Inspect and repair any damaged wiring or electrical connections.
  4. Clear the DTC and reset the MIL to see if the issue has been resolved.
  5. Perform a test drive to ensure that the coolant temperature is within the normal operating range and that the check engine light does not reappear.

Cost to Fix P25AF 2017 GMC Sierra

The typical repair costs for addressing a P25AF code on a 2017 GMC Sierra can range from $200 to $500, depending on the specific cause of the issue and the cost of parts and labor. It's important to note that diagnosis time and labor rates at auto repair shops can vary, with hourly rates typically ranging between $80 and $150. Rates may be higher at dealerships or in metropolitan areas, while independent shops may offer lower prices. For a more accurate estimate, it's recommended to contact local auto repair shops for pricing information.

Need more information about the P25AF 2017 GMC Sierra code?

Need more information on how to fix the P25AF 2017 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P25AF 2017 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 2017 GMC Sierra Code

1. What are the common symptoms of OBDII code P25AF in a 2017 GMC Sierra?

The common symptoms of code P25AF may 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 2017 GMC Sierra?

OBDII code P25AF in a 2017 GMC Sierra indicates a malfunction related to the Coolant Temperature Control Module Requested MIL Illumination.

3. What are the possible causes of OBDII code P25AF in a 2017 GMC Sierra?

Possible causes of code P25AF can include a faulty coolant temperature control module, wiring issues, a malfunctioning engine coolant temperature sensor, or a software problem.

4. How can I diagnose the OBDII code P25AF in my 2017 GMC Sierra?

Diagnosing code P25AF typically involves using an OBDII scanner to retrieve the trouble codes, inspecting the coolant temperature control module and related wiring, and testing the engine coolant temperature sensor.

5. Can I still drive my 2017 GMC Sierra with the OBDII code P25AF present?

It is not recommended to drive your GMC Sierra with the P25AF code present, as it may lead to engine overheating and potential damage. It's best to address the issue promptly.

6. How can I repair OBDII code P25AF in my 2017 GMC Sierra?

Repairing code P25AF may involve replacing the faulty coolant temperature control module, repairing any damaged wiring, replacing the engine coolant temperature sensor, or updating the module's software.

7. Will resetting the check engine light resolve the OBDII code P25AF in my 2017 GMC Sierra?

Simply resetting the check engine light will not resolve the underlying issue causing code P25AF. It's essential to diagnose and address the root cause of the problem.

8. Is it safe to ignore the OBDII code P25AF in my 2017 GMC Sierra?

Ignoring code P25AF can lead to potential engine overheating and other serious issues. It's crucial to address the problem promptly to prevent further damage.

9. Can a DIY enthusiast fix the OBDII code P25AF in a 2017 GMC Sierra?

While some aspects of diagnosing and repairing code P25AF may be DIY-friendly, it's recommended to seek professional help, especially when dealing with electronic modules and sensors.

10. How much does it cost to repair OBDII code P25AF in a 2017 GMC Sierra?

The cost of repairing code P25AF can vary depending on the exact cause of the issue, parts needed for replacement, and labor costs. It's advisable to obtain quotes from reputable mechanics or dealerships for an accurate estimate.

Discuss the causes and fixes for P25AF 2017 GMC Sierra OBDII Code

Submit a New Comment

Code P25AF 2017 GMC Sierra comments

No comments found for this page.