AutoCodes – Hummer – C0277 Hummer

C0277 Hummer 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 Hummer 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 1,471
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jul 05, 2023
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Code C0277 Hummer 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 Hummer - Brake Pedal Position Sensor Circuit - AutoCodes.com
C0277 Hummer Code - Brake Pedal Position Sensor Circuit

What are the Possible Causes of the DTC C0277 Hummer?

  • 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 Hummer?

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.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C0277 Hummer 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 Hummer code?

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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 Hummer Code

1. What are the common symptoms of OBDII code C0277 in a Hummer related to the brake pedal position sensor circuit?

- Common symptoms include erratic brake lights, issues with cruise control, traction control problems, and potential difficulty shifting out of park.

2. What are the typical causes of OBDII code C0277 in a Hummer?

- The code C0277 in a Hummer is often caused by a faulty brake pedal position sensor, damaged wiring harness, or a failed electronic brake control module.

3. How can I diagnose the brake pedal position sensor circuit issue in my Hummer?

- To diagnose the issue, you can use a diagnostic scanner to read the OBDII code C0277, visually inspect the wiring harness for any damage, and test the brake pedal position sensor for proper function.

4. Are there any DIY repair tips for fixing OBDII code C0277 in a Hummer?

- DIY repair tips include checking and cleaning the brake pedal position sensor connections, inspecting and repairing any damaged wiring, and resetting the trouble code to see if it reoccurs.

5. Can driving with OBDII code C0277 in a Hummer cause further damage?

- While driving with the code may not cause immediate harm, it is recommended to address the issue promptly to ensure proper brake system function and avoid potential safety hazards.

6. How much does it typically cost to repair OBDII code C0277 in a Hummer?

- The cost of repairing OBDII code C0277 in a Hummer can vary depending on the specific cause of the issue, but it may range from $100 to $300 for parts and labor.

7. Is it safe to continue driving my Hummer with OBDII code C0277 present?

- It is generally not recommended to drive with unresolved OBDII codes, as they can indicate underlying issues that may affect the vehicle's performance and safety.

8. Can a bad brake pedal position sensor affect the overall braking performance of a Hummer?

- Yes, a faulty brake pedal position sensor can affect the proper operation of the braking system, potentially leading to issues with brake lights, cruise control, and traction control.

9. Will resetting the OBDII code C0277 in my Hummer make the problem go away permanently?

- Resetting the code may temporarily clear the warning light, but if the underlying issue such as a faulty sensor or wiring problem is not addressed, the code is likely to reappear.

10. How long does it take to repair the brake pedal position sensor circuit issue causing OBDII code C0277 in a Hummer?

- The repair time can vary depending on the complexity of the issue, but it typically takes about 1-2 hours for a professional mechanic to diagnose and repair the brake pedal position sensor circuit problem.

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