AutoCodes – GMC – C1226 GMC

C1226 GMC Code - Right Front Excessive Wheel Speed Variation

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: C1226 GMC indicates Right Front Excessive Wheel Speed Variation.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 1,902

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 27, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code C1226 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 C1226 GMC - Right Front Excessive Wheel Speed Variation - AutoCodes.com — C1226 GMC Code - Right Front Excessive Wheel Speed Variation

What does this mean?

What are the Possible Causes of the DTC C1226 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 C1226 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 C1226 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 C1226 GMC code?

Need more information on how to fix the C1226 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1226 GMC 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 C1226 GMC Code

1. What are the common symptoms of OBDII code C1226 GMC (Right Front Excessive Wheel Speed Variation)?

The common symptoms include ABS warning light illuminated on the dashboard, traction control system malfunction, and potential loss of traction or stability while driving.

2. What are the possible causes of OBDII code C1226 GMC?

Possible causes may include a faulty wheel speed sensor, damaged wiring or connectors related to the right front wheel speed sensor, or issues with the ABS module.

3. How can I diagnose the cause of OBDII code C1226 GMC?

Diagnosing this code typically involves using a professional OBDII scanner to read the code, inspecting the right front wheel speed sensor and its connections, and performing a visual inspection of the ABS system components.

4. What are some repair tips for addressing OBDII code C1226 GMC?

Repair tips may include cleaning or replacing the right front wheel speed sensor, repairing any damaged wiring or connectors, resetting the ABS system, and conducting a road test to ensure the issue is resolved.

5. Can I continue driving with OBDII code C1226 GMC present?

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

6. How serious is OBDII code C1226 GMC?

This code should be addressed promptly, as it indicates a fault in the right front wheel speed sensor system, which is crucial for the proper operation of the vehicle's ABS and traction control systems.

7. Are there any safety concerns associated with OBDII code C1226 GMC?

Yes, there are safety concerns, as the code relates to a potential issue with the right front wheel speed sensor, which can impact the vehicle's ability to maintain traction and stability during braking and cornering.

8. Can I repair OBDII code C1226 GMC myself, or should I seek professional help?

While some DIY enthusiasts may be able to address this code by cleaning or replacing the wheel speed sensor, it is recommended to seek professional help for an accurate diagnosis and repair, especially if unsure about the process.

9. How much does it typically cost to repair OBDII code C1226 GMC?

The cost of repairing this code can vary depending on the exact cause of the issue, the labor rates in your area, and whether any parts need to be replaced. It is advisable to obtain quotes from reputable mechanics or service centers.

10. Will resetting the OBDII system clear OBDII code C1226 GMC?

Resetting the OBDII system may temporarily clear the code, but it is important to diagnose and address the underlying issue causing the code to prevent it from reoccurring.