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P25AF 2015 Chevrolet Silverado Code - Coolant Temperature Control Module Requested MIL Illumination

Quick Answer

The P25AF diagnostic trouble code (DTC) in a 2015 Chevrolet Silverado 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 or coolant leak. 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 Chevrolet Silverado 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 or coolant leak.
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 20, 2024
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Code P25AF 2015 Chevrolet Silverado Description

The P25AF diagnostic trouble code (DTC) in a 2015 Chevrolet Silverado indicates that the Coolant Temperature Control Module has requested the Malfunction Indicator Lamp (MIL) to illuminate. This code typically points to an issue with the coolant temperature control system, which plays a crucial role in regulating the engine's operating temperature. The coolant temperature control module is responsible for monitoring and adjusting the engine coolant temperature to ensure optimal performance and prevent overheating.

OBDII Code P25AF 2015 Chevrolet Silverado - Coolant Temperature Control Module Requested MIL Illumination
P25AF 2015 Chevrolet Silverado Code - Coolant Temperature Control Module Requested MIL Illumination

Common Causes of P25AF 2015 Chevrolet Silverado

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

Symptoms of P25AF 2015 Chevrolet Silverado

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

How to Fix P25AF 2015 Chevrolet Silverado

  1. Diagnose the specific cause of the code by using a scan tool to retrieve freeze frame data and live data from the coolant temperature sensor.
  2. Inspect the coolant level and check for any leaks in the cooling system. Top up the coolant if necessary.
  3. Test the coolant temperature sensor and coolant temperature control module for proper operation. Replace any faulty components.
  4. Inspect the radiator and cooling system for any blockages or restrictions. Flush the system if needed.
  5. Clear the DTC and reset the MIL after completing the repairs.

Cost to Fix P25AF 2015 Chevrolet Silverado

The cost of repairing a P25AF code in a 2015 Chevrolet Silverado can vary depending on the specific cause of the issue and the labor rates in your area. On average, you can expect to pay between $150 to $400 for parts and labor. Keep in mind that diagnostic time and labor rates at auto repair shops can fluctuate, so it's recommended to get quotes from multiple shops to ensure you're getting a fair price.

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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 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P25AF in a 2015 Chevrolet Silverado?

The common symptoms include the Check Engine Light (MIL) illuminating, engine overheating, poor fuel efficiency, and potential issues with the vehicle's heating system.

2. What does the OBDII code P25AF indicate in a 2015 Chevrolet Silverado?

The P25AF code specifically relates to a fault with the Coolant Temperature Control Module Requested MIL Illumination in the vehicle's engine control system.

3. What are the possible causes of OBDII code P25AF in a 2015 Chevrolet Silverado?

Possible causes of this code may include a faulty coolant temperature sensor, issues with the coolant temperature control module, wiring problems, or a malfunction in the engine control module.

4. How can I diagnose OBDII code P25AF in my 2015 Chevrolet Silverado?

Diagnosing this code typically involves using an OBDII scanner to retrieve the code, inspecting the coolant temperature sensor and related components, checking for wiring faults, and conducting tests on the control module.

5. Can I continue driving my 2015 Chevrolet Silverado with OBDII code P25AF illuminated?

It is not recommended to drive the vehicle with the Check Engine Light on, as it indicates a potential issue that may affect performance and fuel efficiency. It is advisable to have the code diagnosed and repaired as soon as possible.

6. How can I reset the Check Engine Light after repairing OBDII code P25AF in my 2015 Chevrolet Silverado?

After repairing the underlying issue causing the P25AF code, you can reset the Check Engine Light using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes to clear the error code.

7. Is it possible to repair OBDII code P25AF in a 2015 Chevrolet Silverado myself?

While some DIY enthusiasts may attempt to address this code themselves, it is recommended to seek professional help, especially when dealing with complex engine control system components and electrical systems.

8. Will OBDII code P25AF cause any long-term damage to my 2015 Chevrolet Silverado if left unrepaired?

Continuing to drive the vehicle with the P25AF code unresolved may lead to potential issues like engine overheating, reduced fuel efficiency, and damage to engine components over time. It is best to address the problem promptly.

9. How much does it typically cost to repair OBDII code P25AF in a 2015 Chevrolet Silverado?

The cost of repairing the P25AF code can vary depending on the exact cause of the issue, the labor rates in your area, and whether genuine OEM parts are used. It is advisable to get estimates from reputable mechanics or dealerships.

10. Can extreme weather conditions affect the occurrence of OBDII code P25AF in a 2015 Chevrolet Silverado?

Extreme weather conditions, such as very low or high temperatures, can potentially impact the coolant temperature control system and trigger the P25AF code. Ensuring proper maintenance and coolant levels can help mitigate such issues.

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