P15FB 2018 GMC Sierra Code - Brake Pedal Position Sensor Signal Message Counter Incorrect
Quick Answer
The P15FB diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates that the Brake Pedal Position Sensor Signal Message Counter is Incorrect. Common causes include Faulty brake pedal position sensor, Damaged wiring or connectors in the sensor circuit, Corrosion or contamination in the sensor connections. 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
- P15FB 2018 GMC Sierra indicates Brake Pedal Position Sensor Signal Message Counter Incorrect.
- Common causes
- Common causes include Faulty brake pedal position sensor, Damaged wiring or connectors in the sensor circuit, Corrosion or contamination in the sensor connections.
- 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 P15FB 2018 GMC Sierra Description
The P15FB diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates that the Brake Pedal Position Sensor Signal Message Counter is Incorrect. This means that the signal being sent by the brake pedal position sensor does not match the expected message counter, leading to a discrepancy in the data being received by the vehicle's electronic control module (ECM). The brake pedal position sensor is a crucial component that helps the ECM determine the driver's braking intentions and adjust various systems accordingly. When this signal is incorrect, it can lead to issues with the vehicle's braking system, stability control, and other safety features.
Common Causes of P15FB 2018 GMC Sierra
- Faulty brake pedal position sensor.
- Damaged wiring or connectors in the sensor circuit.
- Corrosion or contamination in the sensor connections.
- ECM software glitch or malfunction.
- Physical damage to the brake pedal assembly.
Symptoms of P15FB 2018 GMC Sierra
- Illumination of the ABS or traction control warning lights on the dashboard.
- Inconsistent or delayed braking response when applying the brakes.
- Reduced stability control effectiveness, especially during sudden maneuvers.
- Difficulty shifting out of park or engaging cruise control.
How to Fix P15FB 2018 GMC Sierra
- Begin by conducting a thorough inspection of the brake pedal position sensor, wiring, and connectors for any visible damage or corrosion.
- Use a diagnostic scanner to retrieve and clear the DTC, then test the sensor's signal output to ensure it matches the expected values.
- If the sensor is faulty, replace it with a new OEM part and recalibrate the ECM to recognize the new sensor.
- Check and repair any damaged wiring or connectors in the sensor circuit to ensure a secure connection.
- Perform a final test drive to confirm that the issue has been resolved and that the ABS and traction control systems are functioning correctly.
Cost to Fix P15FB 2018 GMC Sierra
The typical repair costs for addressing the P15FB code on a 2018 GMC Sierra can range from $150 to $400, depending on the specific cause of the issue and the cost of parts and labor in your area. This estimate includes the price of a new brake pedal position sensor, any necessary wiring repairs, and the labor required to diagnose and fix the problem. Keep in mind that the actual costs may vary based on the location of the repair shop, the vehicle's make and model, and the extent of the repairs needed. It is recommended to obtain quotes from multiple auto repair shops to compare prices and ensure a fair cost for the repair.
Need more information about the P15FB 2018 GMC Sierra code?
Need more information on how to fix the P15FB 2018 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P15FB 2018 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P15FB 2018 GMC Sierra Code
No Frequently Asked Questions about P15FB 2018 GMC Sierra Code found.
Discuss the causes and fixes for P15FB 2018 GMC Sierra OBDII Code
Code P15FB 2018 GMC Sierra 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.