OBD Brake Pedal Position Sensor B Circuit High
What it means
P05DE stands for Brake Pedal Position Sensor B Circuit High. P05DE is a P code, so the fault sits in the engine, transmission and emissions systems. For P05DE, the second digit places it in speed and idle control. For P05DE, work through the cause list below, cheapest checks first.
Where it lives
For P05DE, the circuit described runs through the sensor. The description of P05DE reports a fault at the sensor.
What to check first
For P05DE, check the wiring and connector on this circuit first, since a broken terminal gives the same reading as a failed part.
Check these first
- P05DE: Faulty sensor or actuator in the control circuit
- P05DE: Wiring, connector, or fuse problem for the affected output
- P05DE: Low or unstable system voltage from the battery or charging system
- P05DE: Failed PCM/ECM or a software error
- P05DE: Poor ground connection for the control module
What to do next
P05DE is a fault in the speed and idle control system. The steps below are general, so what actually failed on your vehicle may not be what P05DE names.
- P05DE: Verify battery voltage and charging system health first
- P05DE: Read all related module codes with an OBD-II scanner
- P05DE: Inspect wiring, connectors, and grounds for the affected circuit
- P05DE: Test the sensor or actuator with live data and actuation commands
- P05DE: Check for PCM software updates or TSBs before replacing modules
Look up another code
Enter a full code or a symptom. Press / to search. How to read a code
Type a code above, or start from a symptom or a common code.
Updated
Generic SAE J2012 definition. Last updated 2026-08-30.