AutoCodes – Buick – P15FB Buick

P15FB Buick Code - Brake Pedal Position Sensor Signal Message Counter Incorrect

Quick Answer

The Electronic Brake Control Module (EBCM) monitors the brake pedal position sensor in order to provide emission related brake pedal position information to the Engine Control Module (ECM). 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: P15FB Buick indicates Brake Pedal Position Sensor 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 448

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 17, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P15FB Buick Description

The Electronic Brake Control Module (EBCM) monitors the brake pedal position sensor in order to provide emission related brake pedal position information to the Engine Control Module (ECM). The EBCM sends the information, via the serial data circuit, to the ECM in a continuously repeating series of 16 rolling counts, with each count assigned a value. When the ECM determines that too many of the counts have an incorrect value, the ECM sets DTC P15FB.

OBDII Code P15FB Buick - Brake Pedal Position Sensor Signal Message Counter Incorrect - AutoCodes.com — P15FB Buick Code - Brake Pedal Position Sensor Signal Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P15FB Buick?

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 P15FB Buick?

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 P15FB Buick 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.

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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 P15FB Buick Code

1. What does the OBDII code P15FB mean on a Buick?

P15FB indicates that the Brake Pedal Position Sensor Signal Message Counter is incorrect, meaning the vehicle's control module has detected an issue with the data communication from the brake pedal position sensor.

2. What are the common symptoms of the P15FB code?

Symptoms may include an illuminated check engine light, issues with brake-related systems like cruise control or traction control, and inconsistent brake pedal sensor readings.

3. What causes the P15FB code to appear?

The code can be caused by a faulty brake pedal position sensor, corroded or damaged wiring, poor electrical connections, or a malfunctioning control module.

4. Can I drive my Buick with the P15FB code active?

Driving with this code may be possible, but it could affect braking-related systems like ABS or traction control. It's best to address the issue promptly for safety and to prevent further damage.

5. How do I diagnose a P15FB code on a Buick?

Start by scanning for codes with an OBDII scanner, inspecting the brake pedal position sensor and its wiring for damage, and checking for poor connections or corrosion at the sensor harness.

6. How do I fix the P15FB code on a Buick?

Repair options include replacing the brake pedal position sensor, repairing or replacing damaged wiring, cleaning corroded connections, or updating/reprogramming the control module if necessary.

7. How much does it cost to fix the P15FB code on a Buick?

The cost can vary, but replacing a brake pedal position sensor typically ranges from $100 to $300, including parts and labor. Wiring repairs may cost less, while module reprogramming could increase the expense.

8. What tools do I need to repair a P15FB code?

You'll need an OBDII scanner, a multimeter for testing electrical connections, basic hand tools, and possibly a wiring repair kit or a replacement sensor.

9. Can a faulty brake pedal position sensor cause other issues?

Yes, it can disrupt systems that rely on brake input, such as cruise control, ABS, or traction control, and may affect overall vehicle performance.

10. How do I prevent the P15FB code from returning?

Regularly inspect and maintain the brake pedal position sensor, check for wiring damage or corrosion, and ensure the vehicle's control modules are updated as required.