C120C Buick Code - Brake Pedal Position Sensor 4 Not Plausible
Quick Answer
The C120C Buick code indicates a problem with the Brake Pedal Position Sensor 4, specifically that the signal it is sending is not plausible. Common causes include Faulty Brake Pedal Position Sensor 4, Wiring or connector issues in the sensor circuit, Corrosion or damage to sensor components. 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
- C120C Buick indicates Brake Pedal Position Sensor 4 Not Plausible.
- Common causes
- Common causes include Faulty Brake Pedal Position Sensor 4, Wiring or connector issues in the sensor circuit, Corrosion or damage to sensor components.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code C120C Buick Description
The C120C Buick code indicates a problem with the Brake Pedal Position Sensor 4, specifically that the signal it is sending is not plausible. The Brake Pedal Position Sensor is a crucial component of the vehicle's braking system, as it detects the position of the brake pedal and sends this information to the vehicle's electronic control unit (ECU). This sensor helps the ECU determine when to engage the brakes, allowing for smooth and efficient braking performance.
Common Causes of C120C Buick
- Faulty Brake Pedal Position Sensor 4
- Wiring or connector issues in the sensor circuit
- Corrosion or damage to sensor components
- ECU software or hardware issues
- Electrical system malfunctions
Symptoms of C120C Buick
- Illumination of the brake warning light on the dashboard
- Delayed response when applying the brakes
- Inconsistent braking performance
- ABS system malfunction
- Vehicle stability control system activation
How to Fix C120C Buick
- Begin by conducting a thorough inspection of the Brake Pedal Position Sensor 4 and its wiring harness for any visible damage or corrosion.
- Test the sensor using a multimeter to check for proper resistance and voltage readings.
- If the sensor is faulty, replace it with a new, OEM-approved sensor.
- Clear the diagnostic trouble codes from the ECU using a scan tool.
- Test drive the vehicle to ensure that the issue has been resolved and that the brake system is functioning correctly.
Cost to Fix C120C Buick
The cost of repairing the Brake Pedal Position Sensor 4 can vary depending on the make and model of the vehicle, as well as the labor rates in your area. On average, the parts for this repair can range from $50 to $150, while the labor costs can be between $100 and $200. Overall, you can expect to pay between $150 and $350 for this repair. It's recommended to consult with a trusted mechanic or auto repair shop to get an accurate estimate based on your specific vehicle and location.
Need more information about the C120C Buick code?
Need more information on how to fix the C120C Buick code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the C120C Buick code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about C120C Buick Code
1. What does the OBDII code C120C mean on a Buick?
The code C120C indicates an issue with the Brake Pedal Position Sensor 4, specifically that its signal is not plausible or consistent with other sensor inputs.
2. What are the common symptoms of code C120C on a Buick?
Symptoms may include ABS or traction control warning lights, reduced braking performance, or erratic brake pedal sensor readings.
3. What causes the C120C code to appear in a Buick?
Possible causes include a faulty brake pedal position sensor, wiring issues, poor electrical connections, or a malfunction in the ABS control module.
4. Can I drive my Buick with the C120C code active?
It is not recommended to drive with this code active, as it may affect braking performance and compromise safety systems like ABS and traction control.
5. How do I diagnose the C120C code on a Buick?
Diagnosis involves scanning for codes, inspecting the brake pedal position sensor and wiring, and checking for proper voltage and continuity in the circuit.
6. Is the brake pedal position sensor the only possible issue for code C120C?
No, while the sensor is a common culprit, the issue could also stem from damaged wiring, corroded connectors, or a failing ABS control module.
7. How is the C120C code fixed on a Buick?
Repairs may include replacing the brake pedal position sensor, repairing damaged wiring, cleaning corroded connectors, or reprogramming the ABS module if necessary.
8. How much does it cost to fix the C120C code on a Buick?
Costs vary depending on the issue, but replacing a brake pedal position sensor typically ranges from $100 to $300, including parts and labor.
9. Can a low battery cause the C120C code in a Buick?
Yes, a low or failing battery can cause electrical issues that might trigger this code, so checking the battery and charging system is recommended.
10. Will clearing the code fix the C120C issue on my Buick?
Clearing the code will reset the warning lights temporarily, but the underlying issue must be addressed to prevent the code from returning.
Discuss the causes and fixes for C120C Buick OBDII Code
Code C120C Buick comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.