AutoCodes – Chevrolet – C0238 Chevrolet

C0238 Chevrolet Code - Wheel Speed Mismatch

Quick Answer

As the wheel spins, the wheel speed sensor produces an Alternating Current (AC) signal. Common causes include Faulty Front or Rear Speed Sensor, Front or Rear Speed Sensor harness is open or shorted, Front or Rear 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
C0238 Chevrolet indicates Wheel Speed Mismatch.
Common causes
Common causes include Faulty Front or Rear Speed Sensor, Front or Rear Speed Sensor harness is open or shorted, Front or Rear 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 29,322
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on May 02, 2020
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Code C0238 Chevrolet 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 C0238 Chevrolet - Wheel Speed Mismatch - AutoCodes.com
C0238 Chevrolet Code - Wheel Speed Mismatch

What are the Possible Causes of the DTC C0238 Chevrolet?

  • Faulty Front or Rear Speed Sensor
  • Front or Rear Speed Sensor harness is open or shorted
  • Front or Rear Speed Sensor circuit poor electrical connection
  • Faulty EBCM

How to Fix the DTC C0238 Chevrolet?

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 C0238 Chevrolet 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.

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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 C0238 Chevrolet Code

1. What are the common symptoms of OBDII code C0238 (Chevrolet) indicating a Wheel Speed Mismatch?

The common symptoms include the ABS warning light being illuminated on the dashboard, traction control issues, and potential difficulty in braking.

2. What are the possible causes of OBDII code C0238 (Chevrolet) Wheel Speed Mismatch?

The code may be triggered by issues such as faulty wheel speed sensors, damaged wiring harnesses, sensor alignment problems, or issues with the ABS module.

3. How can I diagnose the cause of OBDII code C0238 (Chevrolet) Wheel Speed Mismatch?

Diagnosing the issue involves checking the wheel speed sensor readings using a diagnostic scan tool, inspecting the wiring for any damage, and ensuring the sensors are properly aligned and functioning.

4. Can a DIY enthusiast repair OBDII code C0238 (Chevrolet) Wheel Speed Mismatch?

While some basic troubleshooting like checking connections and sensor alignment can be done by enthusiasts, complex repairs involving sensor replacement or ABS module reprogramming may require professional assistance.

5. How serious is OBDII code C0238 (Chevrolet) Wheel Speed Mismatch?

This code should be taken seriously as it can affect the proper functioning of the vehicle's ABS and traction control systems, potentially compromising safety during braking and driving on slippery roads.

6. Is it safe to continue driving with OBDII code C0238 (Chevrolet) Wheel Speed Mismatch?

It is not recommended to continue driving with this code active, as it could impact the vehicle's stability and braking performance. It's best to have the issue diagnosed and repaired promptly.

7. How much does it typically cost to repair OBDII code C0238 (Chevrolet) Wheel Speed Mismatch?

The cost of repair can vary depending on the underlying cause, but it may involve replacing wheel speed sensors, repairing wiring harnesses, or reprogramming the ABS module. Costs can range from a few hundred to over a thousand dollars.

8. Can weather conditions affect the triggering of OBDII code C0238 (Chevrolet) Wheel Speed Mismatch?

Yes, extreme weather conditions like heavy rain, snow, or ice can sometimes interfere with the wheel speed sensors, leading to a mismatch and triggering the code.

9. How long does it usually take to repair OBDII code C0238 (Chevrolet) Wheel Speed Mismatch?

The repair time can vary based on the specific cause of the issue and the complexity of the repair needed. Simple fixes like sensor alignment may take a short time, while more involved repairs could take several hours.

10. Are there any preventive measures to avoid OBDII code C0238 (Chevrolet) Wheel Speed Mismatch?

Regularly inspecting and maintaining the wheel speed sensors, checking the wiring harnesses for damage, and addressing any warning signs promptly can help prevent the occurrence of this code.

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