Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Possible Causes
The (P057B, P057C, P057D, U11BF) Brake Pedal Travel Sensor faults can set for any of the following:
| POSSIBLE CAUSES |
|---|
| 5-VOLT SUPPLY CIRCUIT OPEN OR SHORTED TO GROUND |
| BRAKE PEDAL TRAVEL SIGNAL CIRCUIT SHORTED TO VOLTAGE (CIRCUIT HIGH) |
| BRAKE PEDAL TRAVEL SIGNAL CIRCUIT SHORTED TO GROUND (CIRCUIT LOW) |
| BRAKE PEDAL TRAVEL SIGNAL CIRCUIT OPEN/HIGH RESISTANCE (CIRCUIT LOW) |
| BRAKE PEDAL TRAVEL GROUND CIRCUIT OPEN/HIGH RESISTANCE (CIRCUIT LOW) |
| FAULTY BRAKE PEDAL POSITION SENSOR |
| FAULTY BRAKE SYSTEM MODULE (BSM) |
The (C053D, C10F5, U0418) performance and implausible/lost message faults can set for any of the following:
| POSSIBLE CAUSES |
|---|
| FAULTY HYDRAULIC ASSEMBLY (BPP AND BRAKE SIMULATOR SENSORS ARE INTERNAL) |
| FAULTY BRAKE SYSTEM MODULE (BSM) |
The (U0121, U0129) Loss of Communication faults can set for any of the following:
| POSSIBLE CAUSES |
|---|
| BATTERY OR IGNITION SUPPLY TO BSM OPEN OR SHORTED TO GROUND |
| BSM GROUND CIRCUIT OPEN/HIGH RESISTANCE |
| BSM CAN BUS CIRCUITS SHORTED TO VOLTAGE |
| BSM CAN BUS CIRCUITS SHORTED TO GROUND |
| BSM CAN BUS CIRCUITS OPEN/HIGH RESISTANCE |
| FAULTY BRAKE SYSTEM CONTROL MODULE (BSCM) |
The Wheel Speed Sensor faults can set for any of the following:
| POSSIBLE CAUSES |
|---|
| SNA OR ERROR MESSAGE FROM BSCM |
| WSS SIGNAL CIRCUITS SHORTED TO VOLTAGE |
| WSS SIGNAL CIRCUITS SHORTED TO GROUND |
| WSS SIGNAL CIRCUITS OPEN/HIGH RESISTANCE |
| WSS GROUND CIRCUIT OPEN/HIGH RESISTANCE |
| DAMAGED TONE WHEEL |
| FAULTY WHEEL SPEED SENSOR |
| FAULTY BRAKE SYSTEM CONTROL MODULE (BSCM) |
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.