AutoCodes – Generic – C1228

C1228 Code - Right Rear 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 Rear Wheel Speed Sensor is part of hub assembly), Faulty Right Rear Wheel Speed Sensor, Right Rear 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: C1228 indicates Right Rear Excessive Wheel Speed Variation.
Common causes: Common causes include Faulty Hub Assembly (Right Rear Wheel Speed Sensor is part of hub assembly), Faulty Right Rear Wheel Speed Sensor, Right Rear 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 21,513

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
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Code C1228 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 C1228 - Right Rear Excessive Wheel Speed Variation - AutoCodes.com — C1228 Code - Right Rear Excessive Wheel Speed Variation

What does this mean?

What are the Possible Causes of the DTC C1228?

Faulty Hub Assembly (Right Rear Wheel Speed Sensor is part of hub assembly)
Faulty Right Rear Wheel Speed Sensor
Right Rear Wheel Speed Sensor harness is open or shorted
Right Rear Wheel Speed Sensor circuit poor electrical connection

How to Fix the DTC C1228?

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 C1228 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 C1228 code?

Need more information on how to fix the C1228 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1228 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C1228 Buick — Right Rear Excessive Wheel Speed Variation
C1228 Cadillac — Right Rear Excessive Wheel Speed Variation
C1228 Chevrolet — Right Rear Excessive Wheel Speed Variation
C1228 GMC — Right Rear Excessive Wheel Speed Variation
C1228 Lexus — STR Solenoid Circuit
C1228 Pontiac — Right Rear Excessive Wheel Speed Variation
C1228 Scion — STR Solenoid Circuit
C1228 Toyota — STR Solenoid Circuit

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 C1228 Code

1. What are the common symptoms of OBDII code C1228 (Right Rear Excessive Wheel Speed Variation)?

A: Common symptoms include the ABS warning light illuminating on the dashboard, potential loss of traction control, and uneven braking performance.

2. What are the possible causes of OBDII code C1228?

A: Possible causes include a faulty wheel speed sensor at the right rear wheel, damaged wiring or connectors in the ABS system, or issues with the ABS control module.

3. How can I diagnose the source of OBDII code C1228?

A: Diagnosis typically involves using a scan tool to retrieve and interpret the ABS system codes, checking the condition of the right rear wheel speed sensor and its wiring, and inspecting the ABS control module for any signs of damage.

4. Can I still drive my vehicle with OBDII code C1228 present?

A: It is not recommended to drive the vehicle with this code present, as it may affect the performance of the ABS system and compromise safety under certain driving conditions.

5. How can I repair OBDII code C1228?

A: Repair options may include replacing the right rear wheel speed sensor, repairing any damaged wiring or connectors, or addressing issues with the ABS control module as needed.

6. Is it possible for OBDII code C1228 to be triggered intermittently?

A: Yes, intermittent issues with the wheel speed sensor or wiring can sometimes trigger the code sporadically, making diagnosis and repair more challenging.

7. Can extreme weather conditions affect the occurrence of OBDII code C1228?

A: Yes, extreme weather conditions such as heavy rain, snow, or ice can potentially exacerbate issues with the wheel speed sensor or ABS system, leading to the triggering of the code.

8. How long does it typically take to repair OBDII code C1228?

A: Repair times can vary depending on the specific cause of the code and the availability of parts, but it is advisable to address the issue promptly to ensure safe driving conditions.

9. Will resetting the OBDII code C1228 make it go away permanently?

A: Resetting the code may temporarily turn off the warning light, but if the underlying issue is not addressed, the code is likely to reappear once the system detects the problem again.

10. Is it possible to prevent OBDII code C1228 from occurring in the future?

A: Regular maintenance of the ABS system, including checking and cleaning wheel speed sensors, inspecting wiring, and keeping the system free of debris, can help prevent the recurrence of this code.