Fault Family System: Chassis (C/P-Codes) 22 SAE Codes

Brake Pedal Position Sensor Circuit

Diagnostic & Technical Explanation

Code C0042 (Brake Pedal Position Sensor Circuit A) sets when the ECM sees an open, shorted, or implausible signal from a brake pedal position sensor, or a mismatch between the redundant A/B sensors (or against the brake pressure sensor) used for brake-by-wire and regenerative braking blend. Causes are a failed potentiometer/Hall sensor at the pedal pivot, a maladjusted pedal assembly, or chafed wiring at the pedal bracket.

These 22 diagnostic trouble codes share one detection mechanism and one repair path, which is why MechanicDB groups them into a single authored fault family rather than repeating the same explanation 22 times.

Codes in this family (22)

Code	Definition	Repair coverage
C0042	Brake Pedal Position Sensor Circuit A	3 ranked fixes
C0043	Brake Pedal Position Sensor Circuit B	3 ranked fixes
C0075	Brake Pedal Position Performance	3 ranked fixes
C0562	Brake Pedal Position Sensor Supply Voltage Circuit/Open	3 ranked fixes
C056D	Brake Pedal Position Sensor Supply Voltage Circuit Low	3 ranked fixes
C056E	Brake Pedal Position Sensor Supply Voltage Circuit High	3 ranked fixes
C05C0	Brake Pedal Position Sensor A Not Learned	3 ranked fixes
C05C1	Brake Pedal Position Sensor B Not Learned	3 ranked fixes
C0619	Brake Pedal Position Sensor 'A' Offset Exceeded Learning Limit	3 ranked fixes
C061A	Brake Pedal Position Sensor 'B' Offset Exceeded Learning Limit	3 ranked fixes
P057A	Brake Pedal Position Sensor A Circuit/Open	3 ranked fixes
P057B	Brake Pedal Position Sensor A Circuit Range/Performance	3 ranked fixes
P057C	Brake Pedal Position Sensor A Circuit Low	3 ranked fixes
P057D	Brake Pedal Position Sensor A Circuit High	3 ranked fixes
P057E	Brake Pedal Position Sensor A Circuit Intermittent/Erratic	3 ranked fixes
P05DB	Brake Pedal Position Sensor B Circuit/Open	3 ranked fixes
P05DC	Brake Pedal Position Sensor B Circuit Range/Performance	3 ranked fixes
P05DD	Brake Pedal Position Sensor B Circuit Low	3 ranked fixes
P05DE	Brake Pedal Position Sensor B Circuit High	3 ranked fixes
P05DF	Brake Pedal Position Sensor B Circuit Intermittent/Erratic	3 ranked fixes
P05E0	Brake Pedal Position Sensor A/B Correlation	3 ranked fixes
P05FF	Brake Pressure Sensor / Brake Pedal Position Sensor Correlation	3 ranked fixes

What this page does not show

This page publishes the fault mechanism and the code index. The licensed dataset adds, for every one of the 15,886 codes, the full authored repair set (56,729 procedures in total) with the fields deliberately withheld here:

Procedures 2..n after the first-listed procedure
Aftermarket parts cost ranges in USD (est_parts_cost_min/max_usd)
Professional labor-hour estimates (est_labor_hours)
Step-by-step diagnostic and repair instructions
Replacement-part mappings and catalog lookups
6,637 manufacturer-specific OEM codes across 32 makes ($149 tier)

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