AutoCodes – GMC – P25C9 2017 GMC Sierra

P25C9 2017 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 2017 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 187

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 2017 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 2017 GMC Sierra - Brake System Control Module 2 Requested MIL Illumination - AutoCodes.com — P25C9 2017 GMC Sierra Code - Brake System Control Module 2 Requested MIL Illumination

What does this mean?

What are the Possible Causes of the DTC P25C9 2017 GMC Sierra?

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

How to Fix the DTC P25C9 2017 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 2017 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 2017 GMC Sierra code?

Need more information on how to fix the P25C9 2017 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P25C9 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 P25C9 2017 GMC Sierra Code

1. What does the OBDII code P25C9 on a 2017 GMC Sierra indicate?

The code P25C9 specifically refers to "Brake System Control Module 2 Requested MIL Illumination" in the GMC Sierra's diagnostics.

2. What are common symptoms associated with the P25C9 code in a 2017 GMC Sierra?

Common symptoms include the illumination of the Malfunction Indicator Lamp (MIL) or Check Engine Light on the dashboard.

3. What are potential causes of the P25C9 code on a 2017 GMC Sierra?

Possible causes may include issues with the brake system control module, wiring or connection problems, software issues, or a malfunction within the control module itself.

4. How serious is the P25C9 code in a 2017 GMC Sierra?

While the code itself might not cause immediate safety concerns, it is essential to address the underlying issue promptly to ensure proper functioning of the brake system.

5. Can I continue driving my 2017 GMC Sierra with the P25C9 code present?

It is recommended to have the vehicle inspected and repaired as soon as possible to prevent any potential safety risks or further damage to the brake system.

6. How can I diagnose the P25C9 code in my 2017 GMC Sierra?

Diagnosis typically involves using an OBDII scanner to retrieve the specific fault code and then conducting further testing to pinpoint the exact cause of the issue.

7. What are some DIY repair tips for the P25C9 code on a 2017 GMC Sierra?

DIY repair may involve checking and securing wiring connections, inspecting the brake system control module for visible damage, or updating software if applicable.

8. Is it recommended to reset the P25C9 code in a 2017 GMC Sierra after repairs?

After addressing the underlying issue, it is advisable to clear the code using an OBDII scanner to reset the Check Engine Light and ensure the repair was successful.

9. Are there any recalls or technical service bulletins related to the P25C9 code in a 2017 GMC Sierra?

It is recommended to check with a GMC dealership or online resources for any relevant recalls or technical service bulletins related to this specific diagnostic trouble code.

10. How much can I expect to pay to repair the P25C9 code on a 2017 GMC Sierra?

Repair costs can vary depending on the exact cause of the issue, but it is recommended to obtain quotes from reputable mechanics or dealerships for an accurate estimate.