AutoCodes – GMC – P15F8 2017 GMC Sierra

P15F8 2017 GMC Sierra Code - Automatic Braking Engine Torque Request Signal Message Counter Incorrect

Quick Answer

The Electronic Brake Control Module (EBCM) and The Engine Control Module (ECM) simultaneously control the vehicle performance. Common causes include Faulty Electronic Brake Control Module (EBCM), Electronic Brake Control Module harness is open or shorted, Electronic Brake Control Module circuit poor electrical connection. 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
P15F8 2017 GMC Sierra indicates Automatic Braking Engine Torque Request Signal Message Counter Incorrect.
Common causes
Common causes include Faulty Electronic Brake Control Module (EBCM), Electronic Brake Control Module harness is open or shorted, Electronic Brake Control Module circuit poor electrical connection.
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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 161
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Aug 16, 2022
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Code P15F8 2017 GMC Sierra Description

The Electronic Brake Control Module (EBCM) and The Engine Control Module (ECM) simultaneously control the vehicle performance. During an automatic brake event, the electronic brake control module sends a serial data message to the engine control module requesting torque reduction. If the engine control module receives corrupt data from the electronic brake control module, Diagnostic Trouble Code (DTC) P15F8 will be set in the engine control module. The engine control module then sends a serial data message to the electronic brake control module that torque reduction is not allowed. The DTC will be set when the ECM detects a corrupted data message from the electronic brake control module.
OBDII Code P15F8 2017 GMC Sierra - Automatic Braking Engine Torque Request Signal Message Counter Incorrect - AutoCodes.com
P15F8 2017 GMC Sierra Code - Automatic Braking Engine Torque Request Signal Message Counter Incorrect

What are the Possible Causes of the DTC P15F8 2017 GMC Sierra?

  • Faulty Electronic Brake Control Module (EBCM)
  • Electronic Brake Control Module harness is open or shorted
  • Electronic Brake Control Module circuit poor electrical connection

How to Fix the DTC P15F8 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 P15F8 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 P15F8 2017 GMC Sierra code?

Need more information on how to fix the P15F8 2017 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P15F8 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 P15F8 2017 GMC Sierra Code

1. What does the OBDII code P15F8 mean on a 2017 GMC Sierra?

P15F8 indicates an issue with the Automatic Braking Engine Torque Request Signal Message Counter, which is related to communication errors between the braking and engine control modules.

2. What are the common symptoms of code P15F8 on a 2017 GMC Sierra?

Symptoms may include the check engine light or service brake warning light turning on, reduced braking performance, or the automatic braking system not functioning properly.

3. What causes the P15F8 code to appear on a 2017 GMC Sierra?

Common causes include a malfunctioning brake control module, a faulty engine control module, wiring or connection issues, or outdated software in one of the modules.

4. Can I still drive my 2017 GMC Sierra with the P15F8 code?

While the vehicle may still be drivable, it is not recommended as the automatic braking system may not function properly, potentially compromising safety.

5. How is the P15F8 code diagnosed?

A technician will use a scan tool to check for related codes, inspect wiring and connections between the modules, and test the communication signals for accuracy.

6. How do you fix the P15F8 code on a 2017 GMC Sierra?

Repairs may involve reprogramming or updating the brake or engine control module software, repairing or replacing damaged wiring, or replacing a faulty control module.

7. How much does it cost to repair the P15F8 code?

Repair costs can vary, but diagnostics typically range from $100 to $200, with additional costs depending on whether a module repair or replacement is needed.

8. Is the P15F8 code covered under warranty for a 2017 GMC Sierra?

It may be covered if your vehicle is still under the powertrain or emissions warranty. Check with your dealership for specific coverage details.

9. Can a dead battery cause the P15F8 code on a 2017 GMC Sierra?

A weak or dead battery can sometimes cause communication errors between modules, potentially triggering the P15F8 code.

10. Do I need to take my 2017 GMC Sierra to a dealer to fix the P15F8 code?

While independent repair shops may be able to fix the issue, a dealer may be better equipped to handle software updates or module replacements specific to GMC vehicles.

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