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

P05DC Brake Pedal Position Sensor B Circuit Range/Performance

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. P05DC means channel B leaves its learned or permitted working range without a clear short – for example from a misadjusted or uncalibrated sensor or contact resistance. No admissible manufacturer document available to us gives thresholds for it.

Likely causes

Pedal sensor misadjusted, misassembled or not calibrated
Contact resistance on signal line B
Sensor worn internally
Brake module

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

P05DBP05DDP05DEP05DFP057BP05E0

References: estimateca.mymitchell.com, law.cornell.edu.