AutoCodes – Generic – B129F

B129F Code - Function LED Semi-Automatic Advanced Parallel Park Circuit Short

Quick Answer

The Body Control Module (BCM) monitors the Central Lock Enable/Disable Switch Semiautomatic Advanced Parallel Park Actuator. Common causes include Faulty Enable/Disable Switch Semiautomatic Advanced Parallel Park Actuator, Enable/Disable Switch Semiautomatic Advanced Parallel Park Actuator harness is open or shorted, Enable/Disable Switch Semiautomatic Advanced Parallel Park Actuator circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means: B129F indicates Function LED Semi-Automatic Advanced Parallel Park Circuit Short.
Common causes: Common causes include Faulty Enable/Disable Switch Semiautomatic Advanced Parallel Park Actuator, Enable/Disable Switch Semiautomatic Advanced Parallel Park Actuator harness is open or shorted, Enable/Disable Switch Semiautomatic Advanced Parallel Park Actuator circuit poor electrical connection.
Severity: Moderate - service should be scheduled soon.
Can I drive?: The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

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Code Popularity 3,907

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 29, 2024

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B129F Description

The Body Control Module (BCM) monitors the Central Lock Enable/Disable Switch Semiautomatic Advanced Parallel Park Actuator. The BCM sets the OBDII code when the Enable/Disable Switch Semiautomatic Advanced Parallel Park Actuator is not to factory specifications.

OBDII Code B129F - Function LED Semi-Automatic Advanced Parallel Park Circuit Short - AutoCodes.com — B129F Code - Function LED Semi-Automatic Advanced Parallel Park Circuit Short

What does this mean?

What are the Possible Causes of the DTC B129F?

Faulty Enable/Disable Switch Semiautomatic Advanced Parallel Park Actuator
Enable/Disable Switch Semiautomatic Advanced Parallel Park Actuator harness is open or shorted
Enable/Disable Switch Semiautomatic Advanced Parallel Park Actuator circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B129F?

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 does this mean?

Code Tech Notes

B129F:11 Function LED Semi-Automatic Advanced Parallel Park Circuit Short To Ground
B129F:12 Function LED Semi-Automatic Advanced Parallel Park Circuit Short To Battery

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B129F 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 B129F code?

Need more information on how to fix the B129F code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B129F code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B129F Ford — Function LED Semi-Automatic Advanced Parallel Park Circuit Short
B129F Lincoln — Function LED Semi-Automatic Advanced Parallel Park Circuit Short
B129F Mercury — Function LED Semi-Automatic Advanced Parallel Park Circuit Short

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 B129F Code

1. What are the common symptoms of OBDII code B129F Function LED Semi-Automatic Advanced Parallel Park Circuit Short?

- The common symptoms include the malfunctioning of the semi-automatic advanced parallel park system, the failure of the LED function indicator, and potential issues with the parallel parking assistance feature.

2. What are the possible causes of OBDII code B129F Function LED Semi-Automatic Advanced Parallel Park Circuit Short?

- The code B129F can be triggered by a short circuit in the wiring harness of the LED indicator, a faulty LED function indicator, or a malfunction in the semi-automatic parallel park system components.

3. How can I diagnose the OBDII code B129F Function LED Semi-Automatic Advanced Parallel Park Circuit Short?

- Diagnosing the code involves inspecting the wiring harness for any visible damage, testing the LED function indicator for proper operation, and using a professional scan tool to check the parallel park system components.

4. Are there any DIY repair tips for fixing OBDII code B129F Function LED Semi-Automatic Advanced Parallel Park Circuit Short?

- DIY repair tips may include checking and repairing any damaged wiring, replacing the faulty LED function indicator, and ensuring all connections related to the parallel park system are secure.

5. Is it safe to drive with OBDII code B129F Function LED Semi-Automatic Advanced Parallel Park Circuit Short active?

- It is generally safe to drive with this code active, as it mainly affects the semi-automatic parallel park feature and the LED indicator functionality. However, it is recommended to address the issue promptly to restore the full functionality of the system.

6. Can resetting the vehicle's computer clear the OBDII code B129F Function LED Semi-Automatic Advanced Parallel Park Circuit Short?

- Resetting the vehicle's computer may temporarily clear the code, but if the underlying issue is not fixed, the code is likely to return. It is important to diagnose and repair the root cause of the problem.

7. Will disconnecting the battery reset OBDII code B129F Function LED Semi-Automatic Advanced Parallel Park Circuit Short?

- Disconnecting the battery may reset the code temporarily, but it is not a guaranteed solution. It is best to address the specific issue causing the code to prevent it from reoccurring.

8. How much does it typically cost to repair OBDII code B129F Function LED Semi-Automatic Advanced Parallel Park Circuit Short at a mechanic or dealership?

- The cost of repairing this code can vary depending on the exact cause of the issue and the labor rates of the mechanic or dealership. It is advisable to get a diagnostic assessment first to determine the specific repairs needed.

9. Can a DIY enthusiast with basic automotive knowledge fix OBDII code B129F Function LED Semi-Automatic Advanced Parallel Park Circuit Short?

- A DIY enthusiast with basic automotive knowledge may be able to address this code by following repair guides, troubleshooting steps, and using appropriate tools. However, more complex issues may require professional assistance.

10. How long does it typically take to repair OBDII code B129F Function LED Semi-Automatic Advanced Parallel Park Circuit Short?

- The repair time for this code can vary depending on the extent of the issue and the specific repairs needed. It could range from a quick fix involving wiring repairs to a more involved process of replacing components, potentially taking a few hours to complete.