AutoCodes – Generic – C0277

C0277 Code - Brake Pedal Position Sensor Circuit

Quick Answer

The brake pedal position sensor is used to sense the action of the driver's application of the brake pedal. 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: C0277 indicates Brake Pedal Position Sensor Circuit.
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.

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Code Popularity 23,048

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 05, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code C0277 Description

The brake pedal position sensor is used to sense the action of the driver's application of the brake pedal. The brake pedal position sensor provides an analog voltage signal that will increase as the brake pedal is applied. The Body Control Module (BCM) provides a low reference signal and a 5 V reference voltage to the brake pedal position sensor. When the variable signal reaches a voltage threshold indicating the brakes have been applied, the BCM will apply battery voltage to the left and right stop lamp control circuits as well as the center high-mounted stop lamp relay control circuit illuminating the left and right stop lamps and the center high mounted stop lamp. The Diagnostic Trouble Code (DTC) will be set when the BCM detects an improper voltage in the brake pedal position sensor 5 V reference circuit.

OBDII Code C0277 - Brake Pedal Position Sensor Circuit - AutoCodes.com — C0277 Code - Brake Pedal Position Sensor Circuit

What does this mean?

What are the Possible Causes of the DTC C0277?

Faulty Brake Pedal Position Sensor
Brake Pedal Position Sensor harness is open or shorted
Brake Pedal Position Sensor circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC C0277?

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 does this mean?

Code Tech Notes

C0277:06 Brake Pedal Position Sensor Circuit Low Voltage/Open
C0277:07 Brake Pedal Position Sensor Circuit High Voltage
C0277:09 Brake Pedal Position Sensor Circuit Too Fast Transitions
C0277:12 Brake Pedal Position Sensor Circuit Below Minimum Threshold
C0277:4B Brake Pedal Position Sensor Circuit Calibration Not Learned

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C0277 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.

Need more information about the C0277 code?

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Need Help with the Code?

Get the C0277 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C0277 Buick — Brake Pedal Position Sensor Circuit
C0277 Cadillac — Brake Pedal Position Sensor Circuit
C0277 Chevrolet — Brake Pedal Position Sensor Circuit
C0277 GMC — Brake Pedal Position Sensor Circuit
C0277 Hummer — Brake Pedal Position Sensor Circuit
C0277 Pontiac — Brake Pedal Position Sensor
C0277 Saturn — Brake Pedal Position Sensor

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about C0277 Code

1. What are the common symptoms of OBDII code C0277 (Brake Pedal Position Sensor Circuit)?

- Common symptoms include the brake lights staying on, difficulty shifting gears, and the inability to start the vehicle.

2. What are the possible causes of OBDII code C0277?

- The code C0277 can be caused by a faulty brake pedal position sensor, damaged wiring in the sensor circuit, or a malfunctioning brake light switch.

3. How can I diagnose the cause of OBDII code C0277?

- You can diagnose the code by visually inspecting the brake pedal position sensor and its wiring, testing the sensor's voltage, and checking the brake light switch for proper operation.

4. Can I drive my vehicle with OBDII code C0277?

- It is not recommended to drive your vehicle with code C0277 as it can affect the proper functioning of the brake system and compromise your safety.

5. How can I repair OBDII code C0277?

- To repair code C0277, you may need to replace the brake pedal position sensor, repair damaged wiring, or adjust/replace the brake light switch as necessary.

6. Will resetting the OBDII code C0277 make it go away permanently?

- Resetting the code may temporarily clear it, but if the underlying issue is not fixed, the code is likely to reappear after driving the vehicle.

7. Are there any DIY repair tips for fixing OBDII code C0277?

- DIY repair tips include checking for loose or damaged wiring, ensuring the brake pedal position sensor is properly aligned, and testing the brake light switch for proper functionality.

8. Can a mechanic help me fix OBDII code C0277?

- Yes, a qualified mechanic can diagnose the issue causing code C0277 and perform the necessary repairs to resolve the problem effectively.

9. How much does it cost to repair OBDII code C0277?

- The cost of repairing code C0277 can vary depending on the cause of the issue, the cost of parts needed, and labor charges. It is advisable to get a professional estimate for an accurate cost.

10. Is OBDII code C0277 a serious issue that requires immediate attention?

- Yes, code C0277 is a serious issue as it can affect the proper functioning of the brake system and compromise safety. It is recommended to address the problem promptly.