AutoCodes – Chevrolet – C129F Chevrolet

C129F Chevrolet Code - Brake Pedal Position Sensor 4 Circuit Calibration

Quick Answer

The Electronic Brake Control Module (EBCM) uses inputs from the electronic brake control brake pedal position sensor to determine when the brake is applied and how much force is used. Common causes include Faulty Brake Pedal Position Sensor, Brake Pedal Position Sensor harness is open or shorted, Brake Pedal Position Sensor 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
C129F Chevrolet indicates Brake Pedal Position Sensor 4 Circuit Calibration.
Common causes
Common causes include Faulty Brake Pedal Position Sensor, Brake Pedal Position Sensor harness is open or shorted, Brake Pedal Position Sensor 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 858
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Sep 04, 2020
πŸ’¬ Need more help? Ask Coddy for instant answers β€” it's free!

Code C129F Chevrolet Description

The Electronic Brake Control Module (EBCM) uses inputs from the electronic brake control brake pedal position sensor to determine when the brake is applied and how much force is used. The electronic brake control module monitors when the driver's foot is on the brake and locks the offset. The offset is locked when 3 out of the 4 inputs indicate the brake pedal is applied. The 4 inputs are brake pedal travel 1, brake pedal travel 2, master cylinder pressure sensor, and the brake pedal position sensor. These inputs are used to determine the driver's braking intent which is used to the control amount of pressure applied to the wheels.
OBDII Code C129F Chevrolet - Brake Pedal Position Sensor 4 Circuit Calibration - AutoCodes.com
C129F Chevrolet Code - Brake Pedal Position Sensor 4 Circuit Calibration

What are the Possible Causes of the DTC C129F Chevrolet?

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

How to Fix the DTC C129F Chevrolet?

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 C129F Chevrolet 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 C129F Chevrolet code?

Need more information on how to fix the C129F Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C129F Chevrolet 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 C129F Chevrolet Code

1. What does OBDII code C129F for Chevrolet indicate?

- OBDII code C129F means "Brake Pedal Position Sensor 4 Circuit Calibration" in Chevrolet vehicles.

2. What are the common symptoms of a Brake Pedal Position Sensor 4 Circuit Calibration issue?

- Common symptoms include erratic brake pedal behavior, traction control and stability control warnings, and potential loss of cruise control functionality.

3. What are the possible causes of OBDII code C129F in a Chevrolet vehicle?

- The code C129F can be triggered by issues such as a faulty brake pedal position sensor, wiring problems, sensor calibration errors, or a malfunctioning electronic brake control module.

4. How can I diagnose a Brake Pedal Position Sensor 4 Circuit Calibration problem in my Chevrolet?

- Diagnosing this issue typically involves using a diagnostic scanner to read the OBDII trouble codes, checking the brake pedal position sensor's connection and wiring, and possibly performing a sensor calibration procedure.

5. Is it safe to drive my Chevrolet with OBDII code C129F present?

- It is not recommended to drive the vehicle with this code active, as it can affect the proper functioning of the brake system and other safety features.

6. Can I repair OBDII code C129F in my Chevrolet myself?

- Repairing this issue may require advanced diagnostic tools and technical knowledge, so it is recommended to have a qualified mechanic address the problem.

7. How much does it typically cost to fix a Brake Pedal Position Sensor 4 Circuit Calibration issue in a Chevrolet?

- The cost of repairs can vary depending on the specific cause of the problem, but it may involve replacing the brake pedal position sensor, addressing wiring issues, or recalibrating the sensor, which can range from $100 to $500 or more.

8. Are there any preventive maintenance tips to avoid OBDII code C129F in my Chevrolet?

- Regularly checking the brake system components, keeping an eye on warning lights, and addressing any brake-related issues promptly can help prevent the occurrence of code C129F.

9. Can a faulty brake pedal position sensor cause other problems in my Chevrolet?

- Yes, a malfunctioning brake pedal position sensor can potentially lead to issues with the vehicle's braking performance, stability control systems, and other safety features.

10. How long does it usually take to repair a Brake Pedal Position Sensor 4 Circuit Calibration issue in a Chevrolet?

- The repair time can vary depending on the exact cause of the problem and the complexity of the repair process, but it typically takes a few hours to a full day to diagnose and fix the issue.

Discuss the causes and fixes for C129F Chevrolet OBDII Code

Code C129F Chevrolet comments

No comments found for this page.

AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play