AutoCodes – Generic – C0235

C0235 Code - Open Or Grounded Rear Speed Signal Circuit

Quick Answer

As the wheel spins, the wheel speed sensor produces an Alternating Current (AC) signal. Common causes include Faulty Rear Speed Sensor, Rear Speed Sensor harness is open or shorted, 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: C0235 indicates Open Or Grounded Rear Speed Signal Circuit.
Common causes: Common causes include Faulty Rear Speed Sensor, Rear Speed Sensor harness is open or shorted, 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.

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Code Popularity 11,672

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 10, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C0235 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 C0235 - Open Or Grounded Rear Speed Signal Circuit - AutoCodes.com — C0235 Code - Open Or Grounded Rear Speed Signal Circuit

What does this mean?

What are the Possible Causes of the DTC C0235?

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

How to Fix the DTC C0235?

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 C0235 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 C0235 code?

Need more information on how to fix the C0235 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C0235 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C0235 Buick — Open Or Grounded Rear Speed Signal Circuit
C0235 Cadillac — Open Or Grounded Rear Speed Signal Circuit
C0235 Chevrolet — Open Or Grounded Rear Speed Signal Circuit
C0235 GMC — Open Or Grounded Rear Speed Signal Circuit
C0235 Subaru — Ignition Switch 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 C0235 Code

1. What are the common symptoms of OBDII code C0235, Open Or Grounded Rear Speed Signal Circuit?

- Common symptoms include erratic speedometer readings, ABS warning light illuminating, and potential issues with the vehicle's traction control system.

2. What are the possible causes of OBDII code C0235?

- Possible causes include a damaged or faulty wheel speed sensor, a broken wire in the speed sensor circuit, or a poor connection in the wiring harness.

3. How can I diagnose the Open Or Grounded Rear Speed Signal Circuit issue?

- You can diagnose the issue by performing a visual inspection of the wiring harness, checking the wheel speed sensor for damage, and using a multimeter to test for continuity in the circuit.

4. Can I drive my vehicle with the OBDII code C0235 present?

- It is not recommended to drive your vehicle with this code present, as it can affect the accuracy of your speedometer and potentially impact the operation of your vehicle's safety systems.

5. How can I repair the Open Or Grounded Rear Speed Signal Circuit issue?

- To repair this issue, you may need to replace the damaged wheel speed sensor, repair any broken wires in the circuit, or address any poor connections in the wiring harness.

6. Will resetting the OBDII code C0235 make it go away permanently?

- Resetting the code may temporarily clear the warning light, but if the underlying issue is not addressed, the code is likely to return once the system detects the problem again.

7. Are there any DIY solutions for fixing the Open Or Grounded Rear Speed Signal Circuit problem?

- DIY solutions may include visually inspecting the wiring for damage, checking the sensor connections for corrosion, and ensuring proper grounding of the speed sensor.

8. How long does it typically take to repair the OBDII code C0235 issue?

- Repair times can vary depending on the specific cause of the problem, but resolving this issue usually takes anywhere from 1 to 3 hours in a professional repair setting.

9. Can a faulty wheel speed sensor cause other issues besides triggering OBDII code C0235?

- Yes, a faulty wheel speed sensor can also cause issues such as ABS system malfunctions, traction control problems, and inaccurate speed readings on your dashboard.

10. Is it necessary to visit a mechanic to resolve the Open Or Grounded Rear Speed Signal Circuit issue?

- While some DIY troubleshooting is possible, seeking the expertise of a qualified mechanic is recommended to accurately diagnose and repair the OBDII code C0235 to ensure proper functioning of your vehicle's systems.