C1202 Buick Code - Left Front 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 Front Wheel Speed Sensor, Left Front Wheel Speed Sensor harness is open or shorted, Left Front 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
- C1202 Buick indicates Left Front Wheel Speed Sensor Input Signal Equals Zero.
- Common causes
- Common causes include Faulty Left Front Wheel Speed Sensor, Left Front Wheel Speed Sensor harness is open or shorted, Left Front 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 C1202 Buick Description
What are the Possible Causes of the DTC C1202 Buick?
- Faulty Left Front Wheel Speed Sensor
- Left Front Wheel Speed Sensor harness is open or shorted
- Left Front Wheel Speed Sensor circuit poor electrical connection
- Faulty Electronic Brake Control Module (EBCM)
How to Fix the DTC C1202 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 C1202 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.
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Frequently Asked Questions about C1202 Buick Code
1. What does the OBDII code C1202 mean on a Buick?
C1202 indicates that the left front wheel speed sensor is not sending a signal to the ABS module, which may affect the vehicle's braking and stability systems.
2. What are common symptoms of the C1202 code on a Buick?
Symptoms may include the ABS light or traction control light turning on, reduced ABS or traction control functionality, and possibly longer braking distances.
3. What causes the C1202 code to appear?
Common causes include a faulty left front wheel speed sensor, damaged wiring or connectors, debris on the sensor, or an issue with the ABS control module.
4. Can I continue driving with the C1202 code active?
While the vehicle may still be drivable, it is not recommended to ignore the code, as the ABS and traction control systems may not function properly, increasing the risk of losing control in certain conditions.
5. How do I diagnose the C1202 code on my Buick?
Start by inspecting the left front wheel speed sensor and its wiring for damage or corrosion. Use a scan tool to confirm the fault and test the sensor's signal output.
6. How can I fix the C1202 code on my Buick?
Common fixes include replacing the left front wheel speed sensor, repairing or replacing damaged wiring, cleaning the sensor, or addressing faults in the ABS control module if needed.
7. What tools are needed to repair the C1202 code?
You may need a scan tool, multimeter, basic hand tools, and possibly a jack or lift to access the wheel speed sensor.
8. How much does it cost to fix the C1202 code on a Buick?
Repair costs vary but typically range from $100 to $300, depending on whether you replace the sensor yourself or have a professional perform the repair.
9. Can a dirty or corroded sensor cause the C1202 code?
Yes, dirt, debris, or corrosion on the wheel speed sensor can interfere with its signal, triggering the C1202 code.
10. Does the C1202 code always mean I need to replace the sensor?
No, the issue could also be related to wiring, connectors, or the ABS module. Proper diagnosis is necessary to determine the root cause.
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