AutoCodes – Cadillac – C0238 Cadillac

C0238 Cadillac 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 Cadillac 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.

Save to My Repairs My Repairs

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

Code Popularity 4,003

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 May 02, 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 C0238 Cadillac 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 Cadillac - Wheel Speed Mismatch - AutoCodes.com — C0238 Cadillac Code - Wheel Speed Mismatch

What does this mean?

What are the Possible Causes of the DTC C0238 Cadillac?

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 Cadillac?

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 Cadillac 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 C0238 Cadillac code?

Need more information on how to fix the C0238 Cadillac code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C0238 Cadillac 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 C0238 Cadillac Code

1. What are the common symptoms of OBDII code C0238 in a Cadillac related to wheel speed mismatch?

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

2. What are the possible causes of OBDII code C0238 Wheel Speed Mismatch in a Cadillac?

Possible causes include damaged wheel speed sensors, faulty wiring or connections, issues with the ABS module, or problems with the wheel bearings.

3. How can I diagnose the OBDII code C0238 in my Cadillac?

Diagnosing the code typically involves using a professional OBDII scanner to retrieve the specific fault codes related to wheel speed sensors and conducting a visual inspection of the sensors and wiring for any visible damage.

4. Can I continue to drive my Cadillac with OBDII code C0238 present?

It is not recommended to drive the vehicle with the code C0238 present, as it can affect the traction control system and ABS functionality, potentially compromising the safety and stability of the vehicle.

5. How can I repair OBDII code C0238 Wheel Speed Mismatch in my Cadillac?

Repairing the code may involve replacing the faulty wheel speed sensor, repairing damaged wiring or connections, resetting the ABS module, or addressing issues with the wheel bearings.

6. Are there any DIY tips for fixing OBDII code C0238 in a Cadillac?

While some basic troubleshooting and visual inspections can be done by DIY enthusiasts, it is recommended to seek professional help for accurate diagnosis and repair of the code to ensure proper functioning of the traction control and ABS systems.

7. How much does it cost to repair OBDII code C0238 in a Cadillac?

The cost of repairing OBDII code C0238 can vary depending on the underlying cause of the issue, the extent of the repairs needed, and labor costs. It is advisable to obtain quotes from reputable auto repair shops for an accurate estimate.

8. Can weather conditions affect the occurrence of OBDII code C0238 in a Cadillac?

Extreme weather conditions such as heavy rain, snow, or icy roads can potentially impact the wheel speed sensors and trigger the code C0238 due to wheel speed mismatch. Regular maintenance and inspection can help prevent such issues.

9. How often should wheel speed sensors be replaced in a Cadillac to prevent OBDII code C0238?

Wheel speed sensors typically have a long lifespan but can deteriorate over time due to wear and tear. It is recommended to replace them as part of regular maintenance or when symptoms of wheel speed mismatch occur to prevent OBDII code C0238.

10. Is it necessary to reset the OBDII system after repairing code C0238 in a Cadillac?

After repairing OBDII code C0238 and addressing the underlying issue, it is advisable to reset the OBDII system to clear the fault codes and ensure proper functioning of the traction control and ABS systems in the Cadillac.