C1208 GMC Code - Left Rear Wheel Speed Sensor Input Signal Equals Zero
Quick Answer
The C1208 GMC code indicates that the left rear wheel speed sensor input signal equals zero. Common causes include Faulty left rear wheel speed sensor, Damaged or corroded wiring/connectors in the sensor circuit, ABS control module malfunction. 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, Damaged or corroded wiring/connectors in the sensor circuit, ABS control module malfunction.
- 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 C1208 GMC Description
The C1208 GMC code indicates that the left rear wheel speed sensor input signal equals zero. This means that the vehicle's onboard computer is not receiving any data from the left rear wheel speed sensor, which is crucial for the proper functioning of the vehicle's anti-lock braking system (ABS) and traction control system. The wheel speed sensors are responsible for monitoring the speed of each wheel and sending this information to the ABS control module to help prevent wheel lock-up during braking and improve overall vehicle stability.
Common Causes of C1208 GMC
- Faulty left rear wheel speed sensor
- Damaged or corroded wiring/connectors in the sensor circuit
- ABS control module malfunction
- Wheel speed sensor tone ring damage
- Electronic control unit (ECU) software issues
Symptoms of C1208 GMC
- ABS warning light illuminated on the dashboard
- Traction control system warning light activated
- Increased stopping distances during braking
- Vehicle skidding or sliding on slippery surfaces
- ABS system engaging unexpectedly or not engaging at all
How to Fix C1208 GMC
- Begin by connecting a diagnostic scanner to the vehicle's onboard computer to retrieve the specific fault code and confirm that the left rear wheel speed sensor input signal equals zero.
- Inspect the left rear wheel speed sensor and its wiring for any visible damage or corrosion. Replace the sensor if necessary.
- Check the sensor circuit for continuity and repair any damaged wiring or connectors.
- Clear the fault code from the ABS control module using the diagnostic scanner.
- Test drive the vehicle to ensure that the ABS and traction control systems are functioning correctly.
Cost to Fix C1208 GMC
The typical repair costs for addressing a C1208 GMC code can vary depending on the specific cause of the issue. In general, replacing a faulty wheel speed sensor can cost between $100 and $200, including parts and labor. However, if additional repairs are needed, such as repairing damaged wiring or replacing the ABS control module, the total cost could range from $200 to $500 or more.
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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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