C120C Code - Brake Pedal Position Sensor 4 Not Plausible
Quick Answer
The C120C diagnostic trouble code (DTC) indicates that the brake pedal position sensor 4 is not providing plausible data to the vehicle's electronic control module (ECM). Common causes include Faulty brake pedal position sensor: The sensor itself may be malfunctioning, leading to inaccurate data being sent to the ECM, Wiring issues: Damaged or corroded wiring connecting the sensor to the ECM can disrupt the signal transmission, causing sensor 4 to provide implausible data, ECM malfunction: A malfunctioning ECM can misinterpret the data received from sensor 4, triggering the C120C DTC. 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 indicates Brake Pedal Position Sensor 4 Not Plausible.
- Common causes
- Common causes include Faulty brake pedal position sensor: The sensor itself may be malfunctioning, leading to inaccurate data being sent to the ECM, Wiring issues: Damaged or corroded wiring connecting the sensor to the ECM can disrupt the signal transmission, causing sensor 4 to provide implausible data, ECM malfunction: A malfunctioning ECM can misinterpret the data received from sensor 4, triggering the C120C DTC.
- 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 C120C Description
The C120C diagnostic trouble code (DTC) indicates that the brake pedal position sensor 4 is not providing plausible data to the vehicle's electronic control module (ECM). 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 ECM. This data is used by the ECM to determine when to engage the brakes, making it a vital safety feature. When sensor 4 is not providing accurate or consistent data, it can lead to issues with the vehicle's braking system, potentially compromising the vehicle's overall performance and safety.
Common Causes of C120C
- Faulty brake pedal position sensor: The sensor itself may be malfunctioning, leading to inaccurate data being sent to the ECM.
- Wiring issues: Damaged or corroded wiring connecting the sensor to the ECM can disrupt the signal transmission, causing sensor 4 to provide implausible data.
- ECM malfunction: A malfunctioning ECM can misinterpret the data received from sensor 4, triggering the C120C DTC.
- Environmental factors: Exposure to moisture or extreme temperatures can damage the sensor or its wiring, leading to sensor failure.
Symptoms of C120C
- Inaccurate braking response: The vehicle may exhibit delayed or inconsistent braking response when the brake pedal is pressed.
- Illuminated brake warning light: The brake warning light on the dashboard may illuminate, indicating a potential issue with the braking system.
- ABS system malfunction: The vehicle's anti-lock braking system (ABS) may not function properly, leading to decreased braking performance in emergency situations.
- Increased stopping distance: The vehicle may require a longer distance to come to a complete stop, posing a safety hazard to the driver and other road users.
How to Fix C120C
- Diagnose the issue: Use a diagnostic scan tool to retrieve the specific DTC and pinpoint the exact cause of the problem.
- Inspect the sensor: Check the condition of the brake pedal position sensor and its wiring for any visible damage or corrosion.
- Replace the sensor: If the sensor is faulty, replace it with a new sensor that is compatible with the vehicle's make and model.
- Repair wiring: If wiring issues are identified, repair or replace the damaged wiring to ensure a secure connection between the sensor and the ECM.
- Clear the DTC: After the repair process is completed, clear the DTC from the ECM using a diagnostic scan tool to reset the system and ensure proper functionality.
Cost to Fix C120C
The cost of repairing a brake pedal position sensor 4 not plausible issue can vary depending on the make and model of the vehicle, as well as the specific cause of the problem. On average, the cost of replacing a brake pedal position sensor and addressing any associated wiring issues can range from $150 to $300 for parts and labor. However, it's important to note that labor rates at auto repair shops can vary significantly, with rates typically ranging from $80 to $150 per hour. Additionally, the cost of diagnostic time and any additional repairs that may be needed could impact the overall cost of addressing this issue. It's advisable to consult with a qualified mechanic or auto repair shop to get a more accurate estimate based on the specific circumstances of your vehicle.
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Code C120C Information for Specific Makes
- C120C Buick — Brake Pedal Position Sensor 4 Not Plausible
- C120C Cadillac — Brake Pedal Position Sensor 4 Not Plausible
- C120C Chevrolet — Brake Pedal Position Sensor 4 Not Plausible
- C120C GMC — Brake Pedal Position Sensor 4 Not Plausible
- C120C Lexus — Linear Solenoid Power Supply System Malfunction
- C120C Mitsubishi — Abnormality In FR/RL Wheel Suction Valve System
- C120C Toyota — Linear Solenoid Power Supply System Malfunction
Frequently Asked Questions about C120C Code
What does the OBDII code C120C mean?
C120C indicates that the brake pedal position sensor 4 is sending signals to the vehicle's computer that are not consistent with expected values, suggesting a malfunction.
What are the common symptoms of a C120C code?
Common symptoms include warning lights on the dashboard, issues with the brake system, erratic braking behavior, and potential loss of cruise control functionality.
What could cause the C120C code to trigger?
Potential causes include a faulty brake pedal position sensor, wiring issues, poor electrical connections, or problems with the vehicle's braking system.
How can I diagnose the C120C code?
To diagnose the C120C code, use an OBDII scanner to confirm the code, inspect the brake pedal position sensor and wiring for damage, and check for any related codes that could indicate other issues.
What are some common repair solutions for the C120C code?
Common repairs include replacing the brake pedal position sensor, repairing or replacing damaged wiring or connectors, and ensuring proper calibration of the brake system.
Can I drive my vehicle if the C120C code is present?
While it may be possible to drive the vehicle, it is not recommended due to potential braking issues. It's best to address the code promptly to ensure safe operation.
What tools do I need to fix the C120C code?
You will typically need an OBDII scanner, multimeter for electrical testing, basic hand tools for sensor replacement, and possibly a repair manual for your specific vehicle.
Will clearing the C120C code fix the problem?
Clearing the code may temporarily turn off the warning light, but it will not fix the underlying issue. A proper diagnosis and repair are necessary to prevent the code from reappearing.
How much does it typically cost to repair the C120C code?
Repair costs can vary widely depending on the cause, but sensor replacement may range from $100 to $300, while more extensive electrical repairs could be higher. It's best to get a quote from a professional mechanic.
Discuss the causes and fixes for C120C OBDII Code
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