AutoCodes – GMC – P25C9 2016 GMC Sierra

P25C9 2016 GMC Sierra Code - Brake System Control Module 2 Requested MIL Illumination

Quick Answer

Control modules constantly monitor the vehicle for any condition which may adversely affect vehicle performance. Common causes include Check Brake System Control Module for codes, Faulty Brake System 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: P25C9 2016 GMC Sierra indicates Brake System Control Module 2 Requested MIL Illumination.
Common causes: Common causes include Check Brake System Control Module for codes, Faulty Brake System 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 182

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

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 P25C9 2016 GMC Sierra 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 Brake System Control Module indicating that DTC has been set in the module.

OBDII Code P25C9 2016 GMC Sierra - Brake System Control Module 2 Requested MIL Illumination - AutoCodes.com — P25C9 2016 GMC Sierra Code - Brake System Control Module 2 Requested MIL Illumination

What does this mean?

What are the Possible Causes of the DTC P25C9 2016 GMC Sierra?

Check Brake System Control Module for codes
Faulty Brake System Control Module

How to Fix the DTC P25C9 2016 GMC Sierra?

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 P25C9 2016 GMC Sierra 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 P25C9 2016 GMC Sierra code?

Need more information on how to fix the P25C9 2016 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P25C9 2016 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 P25C9 2016 GMC Sierra Code

1. What are the common symptoms of OBDII code P25C9 in a 2016 GMC Sierra?

The common symptoms of OBDII code P25C9 in a 2016 GMC Sierra include the illuminated Check Engine Light (MIL) on the dashboard and potential issues with the brake system functionality.

2. What does OBDII code P25C9 in a 2016 GMC Sierra indicate?

OBDII code P25C9 in a 2016 GMC Sierra indicates that the Brake System Control Module 2 has requested the MIL (Malfunction Indicator Lamp) to illuminate due to a detected issue.

3. What are some possible causes of OBDII code P25C9 in a 2016 GMC Sierra?

Possible causes of OBDII code P25C9 in a 2016 GMC Sierra include faulty wiring or connections related to the Brake System Control Module 2, a malfunction within the control module itself, or issues with other components in the brake system.

4. How can I diagnose OBDII code P25C9 in a 2016 GMC Sierra?

Diagnosing OBDII code P25C9 in a 2016 GMC Sierra typically involves using a diagnostic scanner to retrieve the specific fault code, checking the brake system components for any visible damage or loose connections, and conducting further testing as needed.

5. Is it safe to drive my 2016 GMC Sierra with OBDII code P25C9 illuminated?

It is generally not recommended to drive your 2016 GMC Sierra with the OBDII code P25C9 illuminated, as it indicates a potential issue with the brake system that could affect the vehicle's safety and performance.

6. Can I reset OBDII code P25C9 in a 2016 GMC Sierra by disconnecting the battery?

While disconnecting the battery may clear the code temporarily, it is not a recommended method to address the underlying issue causing OBDII code P25C9 in a 2016 GMC Sierra. Proper diagnosis and repair are necessary to resolve the problem effectively.

7. How should I repair OBDII code P25C9 in my 2016 GMC Sierra?

Repairing OBDII code P25C9 in a 2016 GMC Sierra may involve inspecting and repairing any damaged wiring or connections related to the Brake System Control Module 2, replacing the control module if necessary, and conducting a thorough brake system inspection and testing.

8. Can a DIY enthusiast fix OBDII code P25C9 in a 2016 GMC Sierra?

While some basic troubleshooting steps can be taken by a DIY enthusiast, diagnosing and repairing OBDII code P25C9 in a 2016 GMC Sierra may require specialized tools and expertise. It is advisable to consult a professional mechanic for proper diagnosis and repair.

9. How much does it cost to repair OBDII code P25C9 in a 2016 GMC Sierra?

The cost to repair OBDII code P25C9 in a 2016 GMC Sierra can vary depending on the underlying cause of the issue, the parts needed for repair, and labor costs. It is recommended to obtain a detailed estimate from a qualified mechanic.

10. Can unresolved OBDII code P25C9 cause further damage to my 2016 GMC Sierra?

Unresolved OBDII code P25C9 in a 2016 GMC Sierra can potentially lead to further damage to the brake system components or affect the overall performance and safety of the vehicle. It is important to address the issue promptly to prevent any potential long-term problems.