AutoCodesGMC – P15F8 2014 GMC Sierra

P15F8 2014 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 2014 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.
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Code Popularity 163
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 2014 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 2014 GMC Sierra - Automatic Braking Engine Torque Request Signal Message Counter Incorrect - AutoCodes.com
P15F8 2014 GMC Sierra Code - Automatic Braking Engine Torque Request Signal Message Counter Incorrect

What are the Possible Causes of the DTC P15F8 2014 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 2014 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 2014 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 2014 GMC Sierra code?

Need more information on how to fix the P15F8 2014 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 P15F8 2014 GMC Sierra Code

What does the OBDII code P15F8 mean on a 2014 GMC Sierra?

Code P15F8 indicates an issue with the Automatic Braking Engine Torque Request Signal Message Counter, meaning the signal communication from the brake system to the engine control module (ECM) is incorrect or inconsistent.

What are the common symptoms of code P15F8 in a 2014 GMC Sierra?

Symptoms may include the check engine light or stability control warning light illuminating, reduced braking performance, or a loss of automatic braking functionality.

What causes the P15F8 code to appear in a 2014 GMC Sierra?

The code can be triggered by a faulty electronic brake control module (EBCM), wiring or communication issues in the CAN bus network, or a software-related problem in the ECM.

Can the P15F8 code affect drivability in my GMC Sierra?

Yes, it can cause issues with braking performance, which may impact safety. In severe cases, it could also limit engine torque, affecting acceleration.

How can I diagnose the P15F8 code on my 2014 GMC Sierra?

Use a scan tool to check for related codes and monitor the EBCM and ECM communication signals. Inspect wiring and connectors in the CAN bus network for damage or corrosion.

What should I do if I see code P15F8 in my GMC Sierra?

Start by clearing the code and test-driving the vehicle. If the code returns, inspect the wiring and connectors or consult a qualified technician for further diagnostics.

Can a software update fix the P15F8 code in a 2014 GMC Sierra?

In some cases, a software update for the ECM or EBCM can resolve communication issues causing this code. Check with your dealership for updates.

Is the P15F8 code covered under warranty for my GMC Sierra?

It depends on your vehicle’s warranty status and the specific terms. Contact your dealership to confirm if repairs related to this code are covered.

How much does it cost to fix the P15F8 code in a GMC Sierra?

Repair costs can vary widely, ranging from $100 for minor wiring repairs to $1,000 or more if the EBCM needs replacement.

Can I drive my 2014 GMC Sierra with the P15F8 code active?

It’s not recommended to drive with this code active, as it may compromise braking performance and vehicle safety. Have the issue diagnosed and repaired promptly.

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