AutoCodes – Chevrolet – P25AF 2016 Chevrolet Silverado

P25AF 2016 Chevrolet Silverado 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 2016 Chevrolet Silverado 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.

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Code Popularity 276

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Jul 15, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P25AF 2016 Chevrolet Silverado Description

Control modules constantly monitor the vehicle for any condition which may adversely affect vehicle performance. If a condition is detected, the module sets a Diagnostic Trouble Code (DTC) and sends a serial data message to the Engine Control Module (ECM). The ECM sets a DTC to inform that the module has set a DTC. The serial data message sent by the module also contains a request for the ECM to illuminate the Malfunction Indicator Lamp (MIL).
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.

OBDII Code P25AF 2016 Chevrolet Silverado - Coolant Temperature Control Module Requested MIL Illumination - AutoCodes.com — P25AF 2016 Chevrolet Silverado Code - Coolant Temperature Control Module Requested MIL Illumination

What does this mean?

What are the Possible Causes of the DTC P25AF 2016 Chevrolet Silverado?

Check Coolant Temperature Control Module for codes
Faulty Coolant Temperature Control Module

How to Fix the DTC P25AF 2016 Chevrolet Silverado?

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 2016 Chevrolet Silverado 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.

Need more information about the P25AF 2016 Chevrolet Silverado code?

Need more information on how to fix the P25AF 2016 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 2016 Chevrolet Silverado Code

What does the OBDII code P25AF mean on a 2016 Chevrolet Silverado?

It refers to a problem where the Coolant Temperature Control Module requests the Malfunction Indicator Lamp (MIL) to illuminate due to a detected fault.

What are the common symptoms of code P25AF?

Common symptoms include the MIL (check engine light) turning on, potential engine overheating, or irregular coolant temperature readings.

What causes the P25AF code to appear?

Causes may include a faulty coolant temperature control module, wiring issues, a bad thermostat, or software-related errors in the module.

Can I keep driving my Silverado with a P25AF code?

While it may not cause immediate issues, driving with this code can risk engine overheating or damage if the coolant system isnâ€™t functioning properly.

How is the P25AF code diagnosed?

A mechanic will use a scan tool to check for the code, inspect the coolant temperature control module, and test related components like the wiring and thermostat.

What repairs are needed to fix the P25AF code?

Repairs may involve replacing the coolant temperature control module, repairing damaged wiring, updating software, or replacing the thermostat.

How much does it cost to repair a P25AF code?

The cost varies, but replacing a coolant temperature control module can range from $200 to $600, including parts and labor.

Can a faulty thermostat trigger the P25AF code?

Yes, a malfunctioning thermostat can cause abnormal coolant temperature readings, leading to the code being triggered.

Is a software update a possible solution for the P25AF code?

Yes, in some cases, reprogramming the engine control module (ECM) or the coolant temperature control module may resolve the issue if itâ€™s software-related.

How can I prevent the P25AF code from recurring?

Regular maintenance, ensuring proper coolant levels, and promptly addressing cooling system issues can help prevent this code from recurring.