C120C Buick Code - Brake Pedal Position Sensor 4 Not Plausible
Quick Answer
The Electronic Brake Control Module (EBCM) uses inputs from the electronic brake control brake pedal position sensor to determine when the brake is applied and how much force is used. Common causes include Faulty Brake Pedal Position Sensor, Brake Pedal Position Sensor harness is open or shorted, Brake Pedal Position 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
- C120C Buick indicates Brake Pedal Position Sensor 4 Not Plausible.
- Common causes
- Common causes include Faulty Brake Pedal Position Sensor, Brake Pedal Position Sensor harness is open or shorted, Brake Pedal Position 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 C120C Buick Description
What are the Possible Causes of the DTC C120C Buick?
- Faulty Brake Pedal Position Sensor
- Brake Pedal Position Sensor harness is open or shorted
- Brake Pedal Position Sensor circuit poor electrical connection
- Faulty Electronic Brake Control Module (EBCM)
How to Fix the DTC C120C 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 C120C 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 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
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