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Engine-Codes – Generic – B2629

B2629 Code - Left Rear Sensor Failure

Quick Answer

The diagnostic code B2629 indicates a Left Rear Sensor Failure. Common causes include Corrosion or damage to the left rear sensor, Faulty wiring or poor electrical connections, ABS control module failure. 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
B2629 indicates Left Rear Sensor Failure.
Common causes
Common causes include Corrosion or damage to the left rear sensor, Faulty wiring or poor electrical connections, ABS control module failure.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code B2629 Description

The diagnostic code B2629 indicates a Left Rear Sensor Failure. This code is typically associated with the vehicle's anti-lock braking system (ABS) or traction control system. The left rear sensor is responsible for monitoring the speed of the wheel and sending this information to the vehicle's computer to help prevent wheel lock-up during braking or loss of traction. When this sensor fails, it can lead to issues with the ABS and traction control systems, affecting the vehicle's overall stability and safety.

OBDII Code B2629 - Left Rear Sensor Failure
B2629 Code - Left Rear Sensor Failure

Common Causes of B2629

  1. Corrosion or damage to the left rear sensor
  2. Faulty wiring or poor electrical connections
  3. ABS control module failure
  4. Impact damage to the sensor or wheel hub
  5. Wear and tear over time leading to sensor degradation

Symptoms of B2629

  1. ABS or traction control warning lights illuminated on the dashboard
  2. Increased stopping distance or reduced braking effectiveness
  3. Traction control system engaging unexpectedly
  4. Uneven braking or pulling to one side during braking
  5. Loss of stability or control on slippery surfaces

How to Fix B2629

  1. Begin by diagnosing the specific cause of the left rear sensor failure using a diagnostic scan tool to retrieve the fault codes and pinpoint the issue.
  2. Inspect the sensor, wiring, and connections for any signs of damage, corrosion, or loose connections. Replace or repair any damaged components as needed.
  3. Test the sensor's functionality by measuring its output with a multimeter to ensure it is providing accurate wheel speed data.
  4. If the sensor itself is faulty, replace it with a new sensor compatible with the vehicle's make and model.
  5. Clear the fault codes from the vehicle's computer memory and test the ABS and traction control systems to ensure proper functionality.

Cost to Fix B2629

The cost of repairing a left rear sensor failure can vary depending on the specific cause of the issue, the make and model of the vehicle, and labor rates in your area. On average, replacing a faulty sensor can cost between $100 and $300 for parts, with additional labor costs ranging from $100 to $200. Keep in mind that diagnostic time and labor rates at auto repair shops can fluctuate, so it's recommended to obtain quotes from local shops for a more accurate estimate.

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Code B2629 Information for Specific Makes

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 B2629 Code

1. What are the common symptoms of OBDII code B2629 (Left Rear Sensor Failure)?

- The common symptoms include issues with the vehicle's stability control system, traction control system, or anti-lock braking system, and may trigger warning lights on the dashboard.

2. What usually causes OBDII code B2629 to appear?

- The code B2629 is typically triggered by a malfunction in the left rear wheel speed sensor, which can be caused by sensor wiring issues, sensor damage, or sensor placement problems.

3. How can I diagnose the cause of OBDII code B2629?

- Diagnosing the cause of B2629 involves checking the wiring and connection of the left rear wheel speed sensor, inspecting the sensor for physical damage, and testing the sensor's functionality using a diagnostic tool.

4. Can I drive my vehicle with OBDII code B2629 present?

- It is not recommended to drive the vehicle with code B2629 present, as it may affect the operation of crucial safety systems like ABS and stability control.

5. How can I repair OBDII code B2629 (Left Rear Sensor Failure)?

- Repairing code B2629 involves fixing or replacing the left rear wheel speed sensor, addressing any wiring issues, and clearing the code using a diagnostic tool.

6. Will resetting the OBDII code B2629 make it go away permanently?

- Resetting the code may temporarily clear the warning lights, but if the underlying issue causing the code is not fixed, it is likely to reappear.

7. Is it possible to prevent OBDII code B2629 from occurring in the future?

- Regular maintenance, including checking the condition of wheel speed sensors and their wiring, can help prevent code B2629 from occurring in the future.

8. Can a DIY enthusiast fix OBDII code B2629 at home?

- While diagnosing and repairing code B2629 may be possible for experienced DIY enthusiasts with the right tools, seeking professional help is recommended for accurate diagnosis and proper repair.

9. How long does it typically take to repair OBDII code B2629?

- The repair time for code B2629 can vary depending on the exact cause of the issue, but it may take anywhere from 1 to 3 hours to diagnose and fix the problem.

10. Are there any safety risks associated with ignoring OBDII code B2629?

- Ignoring code B2629 can pose safety risks due to potential malfunctions in critical safety systems like ABS and traction control, compromising the vehicle's stability and braking performance.

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