P25C9 2018 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 2018 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.
Code P25C9 2018 GMC Sierra Description
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.
What are the Possible Causes of the DTC P25C9 2018 GMC Sierra?
- Check Brake System Control Module for codes
- Faulty Brake System Control Module
How to Fix the DTC P25C9 2018 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 2018 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 2018 GMC Sierra code?
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Frequently Asked Questions about P25C9 2018 GMC Sierra Code
1. What does the OBDII code P25C9 mean on a 2018 GMC Sierra?
The code P25C9 indicates that the Brake System Control Module 2 has requested the Malfunction Indicator Light (MIL) to illuminate due to a detected issue.
2. What are the common symptoms of code P25C9 on a 2018 GMC Sierra?
Common symptoms include the illumination of the check engine light or brake warning light, ABS or traction control system malfunctions, and possible reduced braking performance.
3. What causes the P25C9 code on a 2018 GMC Sierra?
This code is typically caused by communication errors between the brake system control module and other modules, a faulty brake system control module, or wiring/connectivity issues.
4. Can I still drive my 2018 GMC Sierra with the P25C9 code?
While the vehicle may still be drivable, it is not recommended as braking or stability control systems may be impaired, increasing the risk of an accident.
5. How is the P25C9 code diagnosed?
A technician will use a scan tool to check for additional codes, inspect wiring and connectors related to the brake system control module, and test the module’s functionality.
6. How do I fix the P25C9 code on my 2018 GMC Sierra?
Repairs may include fixing damaged wiring, replacing faulty connectors, reprogramming or replacing the brake system control module, or addressing related system faults.
7. Is the P25C9 code covered under warranty for the 2018 GMC Sierra?
Depending on your vehicle’s warranty and mileage, the brake system control module may be covered under the powertrain or emissions warranty. Check with your dealer.
8. What tools are needed to troubleshoot the P25C9 code?
You will need an advanced OBDII scan tool capable of reading manufacturer-specific codes, a multimeter for testing wiring, and possibly a service manual for reference.
9. Can a dead battery cause the P25C9 code on a 2018 GMC Sierra?
Yes, a low or dead battery can cause communication errors between modules and trigger this code. Ensure the battery is in good condition before further diagnosis.
10. How much does it cost to fix the P25C9 code on a 2018 GMC Sierra?
Repair costs can vary depending on the issue, ranging from $100 for simple wiring repairs to over $1,000 for module replacement and reprogramming.
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