C0235 GMC 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 GMC 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.
Code C0235 GMC Description
What are the Possible Causes of the DTC C0235 GMC?
- 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 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 C0235 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 C0235 GMC code?
Need more information on how to fix the C0235 GMC code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the C0235 GMC code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about C0235 GMC Code
1. What does the OBDII code C0235 mean for a GMC vehicle?
C0235 indicates an issue with the rear speed signal circuit, specifically an open or grounded condition that disrupts communication with the vehicle's electronic control system.
2. What are the common symptoms of code C0235 in a GMC?
Common symptoms include the ABS warning light turning on, reduced braking performance, erratic speedometer readings, and possible activation of the traction control or stability control lights.
3. What causes code C0235 to appear on a GMC?
Potential causes include damaged wiring in the rear speed sensor circuit, a faulty rear wheel speed sensor, corroded or loose electrical connections, or a malfunctioning ABS module.
4. How can I diagnose the C0235 code on my GMC?
Start by using an OBDII scanner to confirm the code, then inspect the rear speed sensor wiring and connectors for damage or corrosion. Test the rear wheel speed sensor with a multimeter to check for proper resistance and signal output.
5. Can I drive my GMC with the C0235 code active?
While the vehicle may still be drivable, it’s not recommended as the ABS and traction control systems may not function correctly, increasing the risk of an accident in certain driving conditions.
6. How do I fix the C0235 code on my GMC?
Repairs may involve replacing a faulty rear speed sensor, repairing or replacing damaged wiring, cleaning corroded connectors, or replacing the ABS module if it’s determined to be defective.
7. How much does it cost to fix the C0235 code on a GMC?
The cost depends on the specific repair, but replacing a rear speed sensor typically costs between $100 and $300, including parts and labor. Wiring repairs or ABS module replacement may cost more.
8. What tools are needed to repair the C0235 code?
Basic tools include an OBDII scanner, a multimeter for testing electrical components, and standard hand tools for accessing and replacing the rear speed sensor or repairing wiring.
9. Can a bad rear wheel speed sensor cause other issues besides the C0235 code?
Yes, a faulty rear speed sensor can lead to problems with the ABS, traction control, and stability control systems, as well as erratic speedometer operation.
10. Is the C0235 code specific to GMC vehicles?
No, the C0235 code can appear in other vehicles as well, but the exact diagnosis and repair process may vary depending on the make and model. Always refer to the service manual for your specific vehicle.
Discuss the causes and fixes for C0235 GMC OBDII Code
Code C0235 GMC comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
