Chassis, generic

C0041 Brake Pedal Switch B

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

Covers brake pedal switch B, the redundant second brake switch used to cross-check brake pedal switch A. The two switches change state in a defined pattern as the pedal is applied; the module compares them and sets this code when switch B is stuck, open, shorted or disagrees with switch A. The redundant signal supports driver-assist features that must reliably know whether the driver is braking. Honda documents DTC C0041-14 as a brake switch fault that, together with resting a foot on the pedal, can falsely trigger the adaptive-cruise, collision-mitigation and lane-/road-departure warning indicators. A fault can disable those assist functions and illuminate warning lamps; stop lamps may be affected depending on wiring.

Likely causes

Brake switch failed or misadjusted
Open or shorted switch wiring
Corroded or loose connector

Symptoms

  • Driver-assist features disabled or false triggers
  • Cruise or adaptive cruise will not set
  • Warning lamp or driver message

Repair estimate

DifficultyEasyDIY possible
Parts and labour€20–180
Time0.3–1 h

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

Parts involved

brake pedal switch b

Related codes

C0040C0042C0043

References: static.nhtsa.gov, en.wikipedia.org.