AutoCodes – Chevrolet – C1211 Chevrolet

C1211 Chevrolet 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 Chevrolet 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.

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Code Popularity 615

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 Nov 19, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1211 Chevrolet Description

As the wheel is rotated, the speed sensor produces an AC voltage that increases with wheel speed. The Electronic Brake Control Module (EBCM) uses the frequency of the AC signal to calculate the wheel speed. The speed sensor is connected to the EBCM by a twisted pair of wires. Twisting reduces noise susceptibility that may cause a Diagnostic Trouble Code (DTC) to set. The DTC will be set if the right rear wheel speed equals 0, and all of the remaining wheel speed sensors are greater than 8 km/h (5 mph) for at least 2.5 seconds.

OBDII Code C1211 Chevrolet - Right Rear Wheel Speed Sensor Input Signal Equals Zero - AutoCodes.com — C1211 Chevrolet Code - Right Rear Wheel Speed Sensor Input Signal Equals Zero

What does this mean?

What are the Possible Causes of the DTC C1211 Chevrolet?

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 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 C1211 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 C1211 Chevrolet Code

1. What does the OBDII code C1211 mean on a Chevrolet?

The code C1211 indicates that the right rear wheel speed sensor is not sending a signal, which may affect the ABS system and traction control.

2. What are common symptoms of code C1211 on a Chevrolet?

Symptoms include the ABS and traction control warning lights illuminating, loss of ABS functionality, and potential loss of traction control.

3. What causes the C1211 code to appear?

Common causes include a faulty right rear wheel speed sensor, damaged wiring or connectors, debris or corrosion at the sensor, or issues with the ABS control module.

4. Can I drive my Chevrolet with the C1211 code active?

While the car is drivable, the ABS and traction control systems may not work properly, increasing the risk of skidding or losing control in slippery conditions.

5. How can I diagnose the C1211 code on a Chevrolet?

Diagnose the issue by inspecting the right rear wheel speed sensor, checking the wiring and connectors for damage or corrosion, and using a scan tool to monitor live wheel speed data.

6. How do I fix the C1211 code on my Chevrolet?

Repairs may include replacing the right rear wheel speed sensor, repairing or replacing damaged wiring, or cleaning debris and corrosion from the sensor area.

7. How much does it cost to fix a C1211 code on a Chevrolet?

The cost depends on the issue but typically ranges from $100 to $300 for sensor replacement, including parts and labor.

8. Can a bad wheel bearing cause the C1211 code on a Chevrolet?

Yes, a worn or damaged wheel bearing can affect the wheel speed sensor's ability to read properly, potentially triggering the code.

9. Will clearing the C1211 code fix the problem?

Clearing the code may reset the warning lights temporarily, but the underlying issue must be addressed to prevent the code from returning.

10. Do I need to recalibrate anything after fixing the C1211 code?

After repairs, it's a good idea to clear the code and test drive the vehicle to ensure the ABS and traction control systems function correctly. Some repairs may require recalibration, depending on the vehicle.