C1208 GMC 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 GMC 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.
Code C1208 GMC Description
What are the Possible Causes of the DTC C1208 GMC?
- 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 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 C1208 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 C1208 GMC Code
1. What does the OBDII code C1208 mean on a GMC vehicle?
Code C1208 indicates that the left rear wheel speed sensor input signal is not being detected or is reading as zero by the vehicle's ABS system.
2. What are the common symptoms of code C1208 on a GMC?
Symptoms may include the ABS warning light or traction control light turning on, reduced braking performance, or the ABS system being disabled.
3. What causes the C1208 code to appear?
Common causes include a faulty left rear wheel speed sensor, damaged wiring or connectors, debris or corrosion on the sensor, or a malfunction in the ABS module.
4. Can I drive my GMC with the C1208 code active?
While the vehicle may still be drivable, the ABS and traction control systems may not function properly, increasing the risk of skidding during hard braking or on slippery surfaces.
5. How do I diagnose a C1208 code on my GMC?
Start by inspecting the left rear wheel speed sensor and its wiring for damage or corrosion. Use a scan tool to monitor the sensor's output and test for continuity in the wiring.
6. How do I fix the C1208 code on a GMC?
Repairs may include replacing the left rear wheel speed sensor, cleaning the sensor and its mounting area, or repairing any damaged wiring or connectors.
7. What tools are needed to fix the C1208 code?
You may need a scan tool, multimeter, jack and jack stands, and basic hand tools to inspect and replace the sensor or repair the wiring.
8. How much does it cost to repair the C1208 code on a GMC?
Replacing a wheel speed sensor typically costs between $50 and $250 for parts and labor, depending on your vehicle and location.
9. Can a dirty sensor cause the C1208 code?
Yes, dirt, debris, or corrosion on the left rear wheel speed sensor can prevent it from reading correctly and trigger the code.
10. Does the C1208 code require reprogramming after repairs?
In most cases, reprogramming is not required. However, clearing the code with a scan tool after repairs is necessary to ensure the issue is resolved.
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