AutoCodes – Generic – C005A

C005A Code - Rear Wheel Speed Sensor Circuit

Quick Answer

The wheel speed sensor receives ignition voltage from the Electronic Brake Control Module (EBCM) and provides a DC square wave signal back to the module. 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: C005A 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.

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Code Popularity 1,741

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 21, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C005A Description

The wheel speed sensor receives ignition voltage from the Electronic Brake Control Module (EBCM) and provides a DC square wave signal back to the module. As the wheel spins, the EBCM uses the frequency of the square wave signal to calculate the wheel speed.

OBDII Code C005A - Rear Wheel Speed Sensor Circuit - AutoCodes.com — C005A Code - Rear Wheel Speed Sensor Circuit

What does this mean?

What are the Possible Causes of the DTC C005A?

Faulty Rear Wheel Speed Sensor
Rear Wheel Speed Sensor harness is open or shorted
Rear Wheel Speed Sensor circuit poor electrical connection
Faulty Electronic Brake Control Module (EBCM)

How to Fix the DTC C005A?

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 C005A 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 C005A code?

Need more information on how to fix the C005A code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C005A code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C005A Buick — Rear Wheel Speed Sensor Circuit
C005A Cadillac — Rear Wheel Speed Sensor Circuit
C005A Chevrolet — Rear Wheel Speed Sensor Circuit
C005A GMC — Rear Wheel Speed Sensor Circuit

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 C005A Code

1. What are the common symptoms of OBDII code C005A (Rear Wheel Speed Sensor Circuit)?

- The common symptoms include the ABS warning light being illuminated on the dashboard, traction control issues, and potential loss of stability control.

2. What are the possible causes of OBDII code C005A (Rear Wheel Speed Sensor Circuit)?

- The code may be triggered by a faulty rear wheel speed sensor, damaged wiring or connectors, or an issue within the ABS control module.

3. How can I diagnose the root cause of OBDII code C005A (Rear Wheel Speed Sensor Circuit)?

- Diagnosis typically involves using a diagnostic scan tool to retrieve the specific code, testing the rear wheel speed sensor for proper operation, and inspecting the wiring and connectors for any damage.

4. Can I drive my vehicle with OBDII code C005A (Rear Wheel Speed Sensor Circuit) present?

- It is not recommended to drive the vehicle with this code present, as it can affect the proper functioning of the ABS and stability control systems, potentially compromising safety.

5. How can I repair OBDII code C005A (Rear Wheel Speed Sensor Circuit)?

- Repair options may include replacing the faulty rear wheel speed sensor, repairing damaged wiring or connectors, or reprogramming the ABS control module.

6. Will resetting the OBDII code C005A (Rear Wheel Speed Sensor Circuit) make it go away permanently?

- Resetting the code without addressing the underlying issue will not make it go away permanently. It is important to diagnose and repair the root cause to prevent the code from reoccurring.

7. Can weather conditions affect the triggering of OBDII code C005A (Rear Wheel Speed Sensor Circuit)?

- Extreme weather conditions, such as heavy rain or snow, can potentially affect the rear wheel speed sensor's performance and lead to the triggering of this code.

8. How much does it typically cost to repair OBDII code C005A (Rear Wheel Speed Sensor Circuit)?

- The cost of repair can vary depending on the specific cause of the issue, but it may range from $100 to $300 for parts and labor.

9. Are rear wheel speed sensor issues covered under warranty by the vehicle manufacturer?

- Depending on the vehicle's warranty coverage, rear wheel speed sensor issues may be covered under certain warranties, such as the powertrain or emissions warranty.

10. Can I use a DIY approach to repair OBDII code C005A (Rear Wheel Speed Sensor Circuit)?

- While some aspects of diagnosing and repairing this code can be done DIY, it is recommended to seek professional help for accurate diagnosis and proper repair to ensure safety and effectiveness.