C1211 GMC Code - Right Rear Wheel Speed Sensor Input Signal Equals Zero
Quick Answer
As the wheel is rotated, the speed sensor produces an AC voltage that increases with wheel speed. Common causes include 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. 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
- C1211 GMC indicates Right Rear Wheel Speed Sensor Input Signal Equals Zero.
- Common causes
- Common causes include 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.
- 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 C1211 GMC Description
What are the Possible Causes of the DTC C1211 GMC?
- 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
- Faulty Electronic Brake Control Module (EBCM)
How to Fix the DTC C1211 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 C1211 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.
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Frequently Asked Questions about C1211 GMC Code
1. What does the OBDII code C1211 on a GMC vehicle mean?
C1211 indicates that the right rear wheel speed sensor is not sending a signal or the signal equals zero, which can affect the anti-lock braking system (ABS).
2. What are the common symptoms of the C1211 code on a GMC?
Symptoms may include the ABS warning light turning on, reduced ABS functionality, and possible loss of traction control.
3. What causes the C1211 code to appear in a GMC vehicle?
Possible causes include a faulty right rear wheel speed sensor, damaged wiring or connectors, a dirty or damaged sensor tone ring, or issues with the ABS module.
4. How do I diagnose the C1211 code on my GMC?
Start by inspecting the right rear wheel speed sensor and its wiring for damage or corrosion, check the tone ring for debris or damage, and use a scan tool to verify the sensor's signal.
5. Can I drive my GMC with the C1211 code?
While the vehicle may still be drivable, the ABS and traction control systems may not function properly, which could affect safety in certain driving conditions.
6. How do I fix the C1211 code on a GMC?
Repairs may involve replacing the faulty wheel speed sensor, repairing or replacing damaged wiring, cleaning the tone ring, or addressing ABS module issues if necessary.
7. How much does it cost to fix the C1211 code on a GMC?
The cost can range from $100 to $300 for a wheel speed sensor replacement, while more complex issues like ABS module repairs may cost significantly more.
8. Can a dirty tone ring cause the C1211 code on a GMC?
Yes, dirt, debris, or damage to the tone ring can prevent the wheel speed sensor from reading properly, triggering the C1211 code.
9. Will clearing the C1211 code fix the problem permanently?
Clearing the code without addressing the underlying issue will only temporarily remove the warning, and the code will likely return.
10. How can I prevent the C1211 code from occurring again?
Regularly inspect and maintain the ABS components, including wheel speed sensors, wiring, and tone rings, to prevent issues like the C1211 code.
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