AutoCodes – Buick – C0055 Buick

C0055 Buick Code - Rear Wheel Speed Sensor Circuit

Quick Answer

The Electronic Control Module (ECM) convert the data from the chicle speed sensor to a 128K pulse/mile signal. Common causes include Faulty Rear Wheel Speed Sensor, Rear Wheel Speed Sensor harness is open or shorted, Rear Wheel Speed 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
C0055 Buick indicates Rear Wheel Speed Sensor Circuit.
Common causes
Common causes include Faulty Rear Wheel Speed Sensor, Rear Wheel Speed Sensor harness is open or shorted, Rear Wheel Speed 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 1,873
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on May 02, 2020
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Code C0055 Buick Description

The Electronic Control Module (ECM) convert the data from the chicle speed sensor to a 128K pulse/mile signal. The Electronic Brake Control Module (EBCM) uses the vehicle speed signal from the ECM in order to calculate the rear wheel speed.
OBDII Code C0055 Buick - Rear Wheel Speed Sensor Circuit - AutoCodes.com
C0055 Buick Code - Rear Wheel Speed Sensor Circuit

What are the Possible Causes of the DTC C0055 Buick?

  • Faulty Rear Wheel Speed Sensor
  • Rear Wheel Speed Sensor harness is open or shorted
  • Rear Wheel Speed Sensor circuit poor electrical connection

How to Fix the DTC C0055 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 C0055 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.

Need more information about the C0055 Buick code?

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Need Help with the Code?

Get the C0055 Buick 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 C0055 Buick Code

1. What are the common symptoms of OBDII code C0055 in a Buick related to the rear wheel speed sensor circuit?

The common symptoms include ABS or traction control warning lights illuminated on the dashboard, erratic behavior of the ABS system, and potential loss of traction control functionality.

2. What are some possible causes of the C0055 code in a Buick?

Possible causes of the C0055 code include a faulty rear wheel speed sensor, damaged wiring or connectors in the circuit, a malfunctioning ABS control module, or issues with the wheel bearing.

3. How can I diagnose the C0055 code in my Buick?

Diagnosing the C0055 code typically involves using a scan tool to retrieve the specific fault codes, inspecting the rear wheel speed sensor and its wiring for damage, checking the connectors for corrosion, and performing a visual inspection of the wheel bearing.

4. Can I continue driving my Buick with the C0055 code present?

It is not recommended to drive your Buick with the C0055 code present as it can affect the functionality of the ABS system and traction control, compromising the vehicle's safety under certain driving conditions.

5. How can I repair the rear wheel speed sensor circuit related to the C0055 code in my Buick?

Repairing the rear wheel speed sensor circuit may involve replacing the faulty sensor, repairing or replacing damaged wiring or connectors, resetting the fault codes with a scan tool, and conducting a test drive to ensure the issue is resolved.

6. Is it possible to reset the C0055 code in a Buick without fixing the underlying issue?

While you can clear the fault codes using a scan tool, it is recommended to address the root cause of the C0055 code to prevent it from reoccurring and ensure the proper functioning of the ABS system.

7. Can extreme weather conditions affect the rear wheel speed sensor circuit and trigger the C0055 code in a Buick?

Extreme weather conditions, such as extreme cold or moisture, can potentially affect the rear wheel speed sensor circuit, leading to the triggering of the C0055 code. It is important to keep the sensor and its connections well-protected.

8. How do I prevent the C0055 code from reoccurring in my Buick?

To prevent the C0055 code from reoccurring, it is essential to perform regular maintenance checks on the ABS system, keep the wheel speed sensors clean and free from debris, and address any issues promptly to maintain the overall health of the system.

9. Can a DIY enthusiast resolve the C0055 code issue in a Buick, or is professional assistance required?

While some basic diagnostics and repairs related to the C0055 code can be done by a DIY enthusiast with the necessary tools and knowledge, complex issues or component replacements may require professional assistance to ensure proper repair and safety.

10. Will the C0055 code in a Buick affect the vehicle's overall performance, aside from the ABS and traction control systems?

While the C0055 code primarily pertains to the rear wheel speed sensor circuit and its impact on the ABS and traction control systems, unresolved issues can potentially affect the vehicle's overall performance and safety, making it crucial to address the problem promptly.

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