AutoCodes – Buick – C1208 Buick

C1208 Buick Code - Left 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 Left Rear Wheel Speed Sensor, Left Rear Wheel Speed Sensor harness is open or shorted, Left 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
C1208 Buick indicates Left Rear Wheel Speed Sensor Input Signal Equals Zero.
Common causes
Common causes include Faulty Left Rear Wheel Speed Sensor, Left Rear Wheel Speed Sensor harness is open or shorted, Left 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 204
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Nov 19, 2023
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Code C1208 Buick 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 left 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 C1208 Buick - Left Rear Wheel Speed Sensor Input Signal Equals Zero - AutoCodes.com
C1208 Buick Code - Left Rear Wheel Speed Sensor Input Signal Equals Zero

What are the Possible Causes of the DTC C1208 Buick?

  • Faulty Left Rear Wheel Speed Sensor
  • Left Rear Wheel Speed Sensor harness is open or shorted
  • Left Rear Wheel Speed Sensor circuit poor electrical connection
  • Faulty Electronic Brake Control Module (EBCM)

How to Fix the DTC C1208 Buick?

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 C1208 Buick 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 C1208 Buick code?

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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 C1208 Buick Code

1. What does the OBDII code C1208 mean for a Buick?

The C1208 code indicates that the left rear wheel speed sensor is not sending a signal to the ABS module, meaning the sensor input is zero.

2. What are the common symptoms of the C1208 code on a Buick?

Common symptoms include the ABS warning light turning on, traction control being disabled, and possible loss of ABS functionality during braking.

3. What causes the C1208 code to appear?

The C1208 code can be caused by a faulty wheel speed sensor, damaged wiring or connectors, corrosion, or issues with the ABS module.

4. How do I diagnose the C1208 code on my Buick?

Diagnosis involves checking the left rear wheel speed sensor, inspecting the wiring and connectors for damage or corrosion, and testing the sensor signal with a multimeter or scan tool.

5. Can I still drive my Buick with the C1208 code?

Yes, but driving with this code may disable the ABS and traction control systems, which can affect braking performance in slippery conditions.

6. How do I fix the C1208 code on a Buick?

Fixing this code typically involves replacing the faulty wheel speed sensor, repairing damaged wiring, or cleaning corroded connectors.

7. How much does it cost to repair a C1208 code on a Buick?

The cost to repair the C1208 code varies but typically ranges from $100 to $300 for parts and labor, depending on whether the sensor or wiring needs replacement.

8. Can a dirty wheel hub cause the C1208 code?

Yes, debris or buildup around the wheel hub can interfere with the sensor's ability to detect the wheel's speed, potentially triggering the C1208 code.

9. Will disconnecting the battery clear the C1208 code?

Disconnecting the battery may temporarily clear the code, but if the underlying issue persists, the code will return.

10. How can I prevent the C1208 code from recurring?

Regularly inspect and maintain the wheel speed sensors, wiring, and connectors, and address any corrosion or damage promptly.

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