AutoCodes – GMC – P15F8 2016 GMC Sierra

P15F8 2016 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 2016 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 154

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Aug 16, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P15F8 2016 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 2016 GMC Sierra - Automatic Braking Engine Torque Request Signal Message Counter Incorrect - AutoCodes.com — P15F8 2016 GMC Sierra Code - Automatic Braking Engine Torque Request Signal Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P15F8 2016 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 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 P15F8 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 P15F8 2016 GMC Sierra code?

Need more information on how to fix the P15F8 2016 GMC Sierra code? Get Access to Factory Service Manuals

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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 2016 GMC Sierra Code

1. What does the OBDII code P15F8 mean on a 2016 GMC Sierra?

The P15F8 code indicates that the Automatic Braking System has detected an error with the engine torque request signal message counter, which may disrupt communication between the brake system and the engine.

2. What are the common symptoms of a P15F8 code?

Symptoms may include the automatic braking system not functioning properly, a warning light on the dashboard, reduced braking performance, or the engine not responding correctly to braking inputs.

3. What causes the P15F8 code to appear?

Common causes include a malfunctioning automatic braking system module, faulty wiring or connectors, software issues, or a problem with the engine control module (ECM) or its communication signals.

4. Can I drive my 2016 GMC Sierra with a P15F8 code?

Driving with a P15F8 code is possible, but it's not recommended as it may compromise the safety features of the automatic braking system and lead to reduced braking performance.

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

Diagnose the code by using an OBDII scanner to confirm the issue, inspect the wiring and connectors for damage, and check for any related codes that might indicate a broader problem with the braking or engine systems.

6. Is the P15F8 code related to a software issue?

Yes, in some cases, the P15F8 code can be caused by outdated or corrupted software in the automatic braking system module or ECM, requiring a software update or reprogramming.

7. What repairs are needed to fix the P15F8 code?

Repairs may include replacing or repairing damaged wiring or connectors, updating the software in the affected modules, or replacing a faulty automatic braking system module or ECM.

8. Will clearing the P15F8 code fix the problem?

Clearing the code may temporarily reset the warning light, but it wonâ€™t fix the underlying issue. Proper diagnosis and repair are necessary to resolve the fault.

9. How much does it cost to fix a P15F8 code on a 2016 GMC Sierra?

The cost varies depending on the root cause, but repairs can range from $100 for simple wiring fixes to over $1,000 if a module needs replacement or reprogramming.

10. Can a faulty sensor cause the P15F8 code?

While the code primarily relates to communication issues, a faulty sensor in the automatic braking system could potentially contribute to the problem by sending incorrect signals to the ECM.