AutoCodes – Generic – C0221

C0221 Code - Right Front Speed Sensor or Circuit Open

Quick Answer

As the wheel spins, the wheel speed sensor produces an Alternating Current (AC) signal. Common causes include Faulty Right Front Speed Sensor, Right Front Speed Sensor harness is open or shorted, Right Front 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: C0221 indicates Right Front Speed Sensor or Circuit Open.
Common causes: Common causes include Faulty Right Front Speed Sensor, Right Front Speed Sensor harness is open or shorted, Right Front 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 6,625

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 Mar 10, 2021

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code C0221 Description

As the wheel spins, the wheel speed sensor produces an Alternating Current (AC) signal. The Electronic Brake Control Module (EBCM) uses the frequency of the AC signal to calculate the wheel speed.

OBDII Code C0221 - Right Front Speed Sensor or Circuit Open - AutoCodes.com — C0221 Code - Right Front Speed Sensor or Circuit Open

What does this mean?

What are the Possible Causes of the DTC C0221?

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

How to Fix the DTC C0221?

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 does this mean?

Code Tech Notes

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C0221 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 C0221 code?

Need more information on how to fix the C0221 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C0221 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C0221 Buick — Right Front Speed Sensor or Circuit Open
C0221 Cadillac — Right Front Speed Sensor or Circuit Open
C0221 Chevrolet — Right Front Speed Sensor or Circuit Open
C0221 GMC — Right Front Speed Sensor or Circuit Open

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 C0221 Code

1. What are the common symptoms of OBDII code C0221 (Right Front Speed Sensor or Circuit Open)?

- The common symptoms include the ABS warning light being illuminated on the dashboard, potential traction control issues, and erratic speedometer readings.

2. What are the possible causes of OBDII code C0221?

- The code C0221 can be triggered by a faulty right front wheel speed sensor, damaged wiring or connectors in the circuit, or issues with the ABS control module.

3. How can I diagnose the cause of OBDII code C0221?

- Diagnosing the code involves inspecting the right front wheel speed sensor and its wiring for damage, checking the sensor's resistance, and using a scan tool to read live data from the ABS system.

4. Can I drive my vehicle with OBDII code C0221 active?

- It is not recommended to drive with the code active, as it can affect the proper functioning of the ABS system, traction control, and other safety features.

5. How can I repair OBDII code C0221?

- Repairing the code typically involves replacing the right front wheel speed sensor if it is faulty, repairing damaged wiring or connectors, and clearing the code with a scan tool.

6. Are there any DIY tips for fixing OBDII code C0221?

- DIY enthusiasts can attempt to visually inspect the sensor and wiring for visible damage before replacing any components. However, professional diagnosis and repair are recommended for accurate and safe repairs.

7. How much does it cost to repair OBDII code C0221 at a mechanic?

- The cost of repairing OBDII code C0221 can vary depending on the exact cause of the issue, but it can range from $100 to $300 for parts and labor.

8. Will resetting the OBDII code C0221 make it go away permanently?

- Resetting the code without addressing the underlying issue will not make it go away permanently. The root cause of the code needs to be diagnosed and repaired to prevent it from recurring.

9. Can extreme weather conditions cause OBDII code C0221 to trigger?

- Yes, extreme weather conditions such as heavy rain, snow, or road salt exposure can potentially damage the wheel speed sensor or its wiring, leading to the activation of code C0221.

10. Is it safe to continue driving if the OBDII code C0221 disappears on its own?

- Even if the code disappears on its own, it is recommended to have the vehicle inspected by a mechanic to ensure that the underlying issue has been resolved and that the ABS system is functioning correctly.