AutoCodes – Chevrolet – C0021 Chevrolet

C0021 Chevrolet Code - Right Front Wheel Speed Sensor Circuit Open Or Shorted To Battery

Quick Answer

The Anti-Lock Brake System (ABS) Module monitors the Right Front Wheel Speed Sensor. Common causes include Faulty Right Front Wheel Speed Sensor, Right Front Wheel Speed Sensor harness is open or shorted, Right Front 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: C0021 Chevrolet indicates Right Front Wheel Speed Sensor Circuit Open Or Shorted To Battery.
Common causes: Common causes include Faulty Right Front Wheel Speed Sensor, Right Front Wheel Speed Sensor harness is open or shorted, Right Front 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 9,742

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 May 01, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C0021 Chevrolet Description

The Anti-Lock Brake System (ABS) Module monitors the Right Front Wheel Speed Sensor. The ABS Module sets the OBDII code when the Right Front Wheel Speed Sensor is not to factory specifications.

OBDII Code C0021 Chevrolet - Right Front Wheel Speed Sensor Circuit Open Or Shorted To Battery - AutoCodes.com — C0021 Chevrolet Code - Right Front Wheel Speed Sensor Circuit Open Or Shorted To Battery

What does this mean?

What are the Possible Causes of the DTC C0021 Chevrolet?

Faulty Right Front Wheel Speed Sensor
Right Front Wheel Speed Sensor harness is open or shorted
Right Front Wheel Speed Sensor circuit poor electrical connection

How to Fix the DTC C0021 Chevrolet?

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 C0021 Chevrolet 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 C0021 Chevrolet code?

Need more information on how to fix the C0021 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C0021 Chevrolet 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 C0021 Chevrolet Code

1. What are the common symptoms of OBDII code C0021 in a Chevrolet, indicating a Right Front Wheel Speed Sensor Circuit Open or Shorted to Battery?

- Common symptoms include the ABS warning light being illuminated on the dashboard, potential traction control system malfunctions, and possible loss of stability control.

2. What are the possible causes of OBDII code C0021 in a Chevrolet?

- The code C0021 can be triggered by a faulty right front wheel speed sensor, damaged wiring or connectors in the circuit, or a short to battery in the sensor circuit.

3. How can I diagnose the cause of OBDII code C0021 in my Chevrolet?

- Diagnostic steps may include visually inspecting the wheel speed sensor and its wiring, testing the sensor with a multimeter, checking for continuity and shorts in the circuit, and using a scan tool to monitor sensor data.

4. Can driving with OBDII code C0021 in a Chevrolet cause further damage?

- While driving with this code may not immediately harm the vehicle, it is advisable to address the issue promptly to ensure proper functioning of the ABS and stability control systems.

5. How can I repair OBDII code C0021 in my Chevrolet?

- Repair options may involve replacing the right front wheel speed sensor, repairing damaged wiring or connectors, clearing the code with a scan tool, and conducting a road test to verify the repair.

6. Are there any DIY tips for troubleshooting OBDII code C0021 in a Chevrolet?

- DIY enthusiasts can start by checking the sensor and wiring for visible damage, performing basic continuity tests with a multimeter, and ensuring all connections are secure before seeking professional help if needed.

7. Can weather conditions affect the triggering of OBDII code C0021 in a Chevrolet?

- Extreme weather conditions, such as heavy rain or snow, can potentially exacerbate issues with the right front wheel speed sensor circuit, leading to the illumination of the ABS warning light and triggering the code.

8. How long does it typically take to repair OBDII code C0021 in a Chevrolet?

- The repair time can vary depending on the exact cause of the code and the expertise of the technician, but resolving this issue usually takes a few hours at a repair shop.

9. Is it safe to drive my Chevrolet with the ABS warning light on due to OBDII code C0021?

- While the vehicle should still be operational, driving with the ABS warning light on indicates that the ABS system may not function properly, potentially compromising safety in emergency braking situations.

10. Can OBDII code C0021 in a Chevrolet be intermittent?

- Yes, intermittent issues with the right front wheel speed sensor circuit can sometimes trigger the code sporadically, making it important to address the underlying problem even if the warning light goes off temporarily.