Chassis, generic

C056E Brake Pedal Position Sensor Supply Voltage Circuit High

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

C056E is stored when the 5 V feed of the brake pedal position sensor rises above its limit. In Ford's 2015–2019 hybrid logic that means more than 5.13 V for 50 ms; the ABS module records C100F and the hybrid powertrain module C056E. An elevated reference usually comes from a short between the supply and a battery-voltage wire, from a missing sensor ground that lets the line float up, or from a failing regulator. Since Bosch-type pedal sensors deliver two redundant outputs referenced to the same supply, a high supply skews both and the plausibility check can no longer help. GM uses C056E in its own way, for instance in the 2017–2019 parking brake case on Acadia, Traverse, Enclave and XT5 (PIT5662A).

Likely causes

Supply wire shorted to a battery-voltage circuit
Open sensor ground letting the reference float high
Faulty 5 V regulator in the brake module

Symptoms

  • Brake system warning lamp
  • Regenerative braking limited
  • Pedal sensor plausibility codes may follow

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€40–450
Time0.5–2 h

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

Parts involved

brake pedal position sensorsensor supply

Related codes

C056DC0562P057BP057E

References: fordservicecontent.com, bosch-mobility.com, eenewseurope.com, static.nhtsa.gov.