AutoCodes – GMC – C1222 GMC

C1222 GMC Code - Right Front Wheel Speed Sensor Input Signal Is Zero

Quick Answer

As the wheel spins, the wheel speed sensor produces an AC signal. Common causes include Faulty Hub Assembly (Right Front Wheel Speed Sensor is part of hub assembly), Faulty Right Front Wheel Speed Sensor, Right Front Wheel Speed Sensor harness is open or shorted. 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: C1222 GMC indicates Right Front Wheel Speed Sensor Input Signal Is Zero.
Common causes: Common causes include Faulty Hub Assembly (Right Front Wheel Speed Sensor is part of hub assembly), Faulty Right Front Wheel Speed Sensor, Right Front Wheel Speed Sensor harness is open or shorted.
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 1,914

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 Aug 26, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1222 GMC Description

As the wheel spins, the wheel speed sensor produces an AC signal. The Electronic Brake Control Module (EBCM) uses the frequency of the AC signal to calculate the wheel speed. The EBCM will set the OBDII code when the sensor is not to factory specifications.

OBDII Code C1222 GMC - Right Front Wheel Speed Sensor Input Signal Is Zero - AutoCodes.com — C1222 GMC Code - Right Front Wheel Speed Sensor Input Signal Is Zero

What does this mean?

What are the Possible Causes of the DTC C1222 GMC?

Faulty Hub Assembly (Right Front Wheel Speed Sensor is part of hub assembly)
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 C1222 GMC?

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 C1222 GMC 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 C1222 GMC code?

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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 C1222 GMC Code

1. What are common symptoms of OBDII code C1222 GMC?

- Common symptoms include the ABS warning light being illuminated on the dashboard, erratic braking behavior, and potential traction control system malfunctions.

2. What does the OBDII code C1222 GMC indicate?

- This code indicates that the right front wheel speed sensor input signal is reading as zero, meaning there is an issue with the sensor or its circuit.

3. What are possible causes of the right front wheel speed sensor input signal being zero?

- Possible causes include a faulty wheel speed sensor, damaged wiring or connectors leading to the sensor, or issues with the sensor's mounting position.

4. How can I diagnose the cause of OBDII code C1222 GMC?

- Diagnosing the issue involves visually inspecting the right front wheel speed sensor and its connections, testing the sensor for proper function, and checking the wiring for any damage.

5. Can I continue driving with OBDII code C1222 GMC active?

- It is not recommended to continue driving with this code active, as it can affect the proper function of the ABS and traction control systems, potentially compromising vehicle safety.

6. How can I repair OBDII code C1222 GMC?

- Repairing this code typically involves replacing the right front wheel speed sensor, repairing any damaged wiring or connectors, and resetting the ABS system to clear the code.

7. Is it necessary to reset the ABS system after fixing OBDII code C1222 GMC?

- Yes, it is important to reset the ABS system after repairing the issue to clear the code and ensure that the system is functioning properly.

8. Can weather conditions affect OBDII code C1222 GMC?

- Extreme weather conditions such as heavy rain, snow, or ice can potentially cause issues with the wheel speed sensor input signal, triggering the C1222 code.

9. How can I prevent OBDII code C1222 GMC from recurring?

- Regularly inspecting and maintaining the wheel speed sensors, ensuring proper mounting and connections, and driving cautiously in adverse weather conditions can help prevent this code from recurring.

10. Do I need special tools to diagnose and repair OBDII code C1222 GMC?

- While specialized diagnostic tools may be helpful for pinpointing the exact cause of the issue, basic tools such as a multimeter for testing circuits and a socket set for sensor replacement are typically sufficient for diagnosis and repair.