AutoCodes – Cadillac – C0021 Cadillac

C0021 Cadillac 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 Cadillac 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 1,626
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on May 01, 2020
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Code C0021 Cadillac 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 Cadillac - Right Front Wheel Speed Sensor Circuit Open Or Shorted To Battery - AutoCodes.com
C0021 Cadillac Code - Right Front Wheel Speed Sensor Circuit Open Or Shorted To Battery

What are the Possible Causes of the DTC C0021 Cadillac?

  • 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 Cadillac?

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 Cadillac 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 Cadillac code?

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

Need Help with the Code?

Get the C0021 Cadillac 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 Cadillac Code

1. What are common symptoms of OBDII code C0021 in a Cadillac related to the right front wheel speed sensor circuit?

The common symptoms of OBDII code C0021 in a Cadillac include ABS warning light illuminated on the dashboard, traction control system malfunction, and potential loss of stability control.

2. What does it mean when the OBDII code C0021 indicates "Right Front Wheel Speed Sensor Circuit Open Or Shorted To Battery" in a Cadillac?

This code suggests that there is an issue with the electrical circuit of the right front wheel speed sensor, indicating either an open circuit or a short circuit to the battery.

3. What are some possible causes of OBDII code C0021 in a Cadillac?

Possible causes of OBDII code C0021 in a Cadillac include a faulty right front wheel speed sensor, damaged wiring or connectors in the circuit, or issues with the ABS control module.

4. How can I diagnose the OBDII code C0021 in my Cadillac related to the right front wheel speed sensor circuit?

To diagnose OBDII code C0021, you can use a diagnostic scanner to read the code and perform a visual inspection of the right front wheel speed sensor, wiring, and connectors for any visible damage. Testing the sensor's resistance and checking for proper voltage can also help identify the issue.

5. Can I still drive my Cadillac with OBDII code C0021 present?

It is not recommended to drive your Cadillac with OBDII code C0021 present, as it can affect the proper functioning of the ABS and traction control systems, potentially compromising your safety on the road.

6. How can I repair OBDII code C0021 in my Cadillac related to the right front wheel speed sensor circuit?

Repairing OBDII code C0021 may involve replacing the right front wheel speed sensor, repairing or replacing damaged wiring or connectors, or addressing any issues with the ABS control module as needed.

7. Will resetting the OBDII code C0021 in my Cadillac make the problem go away?

Resetting the OBDII code C0021 may temporarily clear the warning light, but if the underlying issue with the right front wheel speed sensor circuit is not addressed, the code is likely to reappear.

8. Is it possible to prevent OBDII code C0021 from occurring in my Cadillac?

Regular maintenance and inspections of the ABS system, including checking the condition of wheel speed sensors and their circuits, can help prevent issues that lead to OBDII code C0021 in your Cadillac.

9. Can a DIY enthusiast with basic automotive knowledge fix OBDII code C0021 in a Cadillac?

Depending on the specific cause of the code, a DIY enthusiast with basic automotive knowledge may be able to address OBDII code C0021 by replacing the right front wheel speed sensor or repairing damaged wiring. However, more complex issues may require professional assistance.

10. How much does it typically cost to repair OBDII code C0021 related to the right front wheel speed sensor circuit in a Cadillac?

The cost of repairing OBDII code C0021 can vary depending on the exact cause of the issue, the extent of the repairs needed, and labor rates in your area. Typically, costs can range from $100 to $300 for parts and labor.

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