Code Definition

P057C — Brake Pedal Position Sensor Voltage Low

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P057C

P057C is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P057C is stored, the module has detected a signal or supply voltage lower than the expected operating range; and a sensor-related fault — the reported value from the named sensor is out of spec.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P057C is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The P057C fault code is set when the Engine Control Module (ECM) detects a lower than expected voltage from the brake pedal position sensor. This sensor plays a critical role in various vehicle systems by monitoring the position of the brake pedal. It provides input to the ECM for functions like cruise control, stability control, and anti-lock braking systems (ABS). A low voltage signal from the brake pedal position sensor may indicate an electrical problem, such as a short to ground, a malfunctioning sensor, or issues with the wiring or connectors. This condition can lead to malfunctions in s...

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