Fault Family System: Powertrain (P-Codes) 5 SAE Codes

Park Brake Sensor Circuit

Diagnostic & Technical Explanation

Code P05E3 (Park Brake Sensor/Switch Circuit) sets when the ECM/BCM detects an open, shorted, or implausible signal from the park (parking) brake applied-position sensor or switch. Causes are a maladjusted or worn switch at the park brake lever/pedal, a failed electric park brake actuator sensor, or chafed wiring under the console or at the rear caliper actuator.

These 5 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 5 times.

Codes in this family (5)

Code	Definition	Repair coverage
P05E3	Park Brake Sensor/Switch Circuit	3 ranked fixes
P05E4	Park Brake Sensor/Switch Circuit Low	3 ranked fixes
P05E5	Park Brake Sensor/Switch Circuit High	3 ranked fixes
P05E6	Park Brake Sensor/Switch Circuit Range/Performance	3 ranked fixes
P05E7	Park Brake Sensor/Switch Circuit Intermittent/Erratic	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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