Powertrain, generic · Vehicle speed, idle control and auxiliary inputs

P05DE Brake Pedal Position Sensor B Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

Brake-by-wire and hybrid systems use a dual-channel pedal travel sensor; channel B runs opposite to A at Toyota (3.6–4.4 V at rest, falling when pressed), so a common fault of both channels shows up. It feeds brake assist and regenerative blending; CARB requires inputs used by other diagnoses to be monitored. A channel fault blocks the A/B correlation P05E0 and usually limits brake assist or regeneration. P05DE means channel B is above its valid range – an open signal, ground or reference line or a short to positive. Mitsubishi's 2022 Outlander PHEV sets it with the regeneration warning light and the check engine light.

Likely causes

Signal line B or connector open
Shared ground or 5 V reference open (sensor A reports too)
Pedal sensor faulty
Signal line B shorted to positive

Symptoms

  • Brake or regeneration warning light
  • Check engine light
  • Regeneration or brake assist reduced, pedal feel changed

Repair estimate

DifficultyHardWorkshop job
Parts and labour€80–600
Time1–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

brake pedal position sensor bsensor wiringbrake control module

Related codes

P05DBP05DCP05DDP05DFP057DP05E0

References: mitsubishitechinfo.com, law.cornell.edu.