AutoCodes – Mercury – B129E Mercury

B129E Mercury Code - Enable/Disable Switch Semiautomatic Advanced Parallel Park Actuator Stuck Closed

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: B129E Mercury indicates Enable/Disable Switch Semiautomatic Advanced Parallel Park Actuator Stuck Closed.
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 736

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
Cost to Diagnose
FAQs
Comments
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Code B129E Mercury 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 B129E Mercury - Enable/Disable Switch Semiautomatic Advanced Parallel Park Actuator Stuck Closed - AutoCodes.com — B129E Mercury Code - Enable/Disable Switch Semiautomatic Advanced Parallel Park Actuator Stuck Closed

What does this mean?

What are the Possible Causes of the DTC B129E Mercury?

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 B129E Mercury?

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 B129E Mercury 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 B129E Mercury Code

What does the OBDII code B129E mean for a Mercury vehicle?

The code B129E indicates that the Enable/Disable Switch for the semiautomatic advanced parallel park actuator is stuck in the closed position, which may prevent proper operation of the parking assist feature.

What symptoms might indicate a B129E code?

Common symptoms include the parking assist feature not functioning, warning lights on the dashboard, or an inability to activate or deactivate the parking assist system.

What could cause the B129E code to be triggered?

Possible causes include a malfunctioning enable/disable switch, a faulty parking assist actuator, wiring issues, or a problem with the vehicle's control module.

How can I diagnose the issue related to the B129E code?

Start by checking the enable/disable switch for continuity and ensuring it is functioning correctly. Inspect the wiring and connectors for signs of damage or corrosion, and scan the vehicle with an OBDII scanner for any additional codes.

Is it safe to drive a vehicle with the B129E code?

While it may not pose an immediate safety risk, driving with a malfunctioning parking assist feature may make parking more difficult. It's advisable to address the code promptly.

What are some repair tips for fixing the B129E code?

Check and replace the enable/disable switch if it is found to be faulty. Inspect and repair any damaged wiring or connectors, and ensure that the parking assist actuator is functioning properly.

Can the B129E code be cleared without repairs?

Yes, you can clear the code using an OBDII scanner, but if the underlying issue is not resolved, the code is likely to return.

Will resetting the vehicleâ€™s computer fix the B129E code?

Resetting the vehicleâ€™s computer may temporarily clear the code, but it will not fix the root cause of the problem. Proper diagnosis and repair are necessary for a permanent solution.

How can I prevent the B129E code from recurring?

Regular maintenance of the parking assist system, including checking the switches and wiring for wear, can help prevent the recurrence of the B129E code.