Chassis, generic

C05C0 Brake Pedal Position Sensor A Not Learned

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

The control unit has no valid learned rest position for channel A of the brake pedal position sensor, so it cannot turn the raw signal into a reliable pedal travel. No manufacturer documents C05C0 publicly. The closest GM analogue is C0277 with failure type 4B: the body module reports that the home position of the pedal sensor was never learned and asks for a recalibration. Stellantis likewise requires a brake pedal learn in the ABS module after a PCM swap or update (C0042-54). Hitachi describes learning the stroke sensor zero only while no brake request is present. Typical triggers are a new sensor, a replaced module or an interrupted learn. C05C1 covers channel B, C0619 an offset outside the learn limit.

Likely causes

Learn procedure not run after sensor or module replacement
Learn routine aborted because the pedal was touched or the vehicle moved
Sensor channel A faulty or mounted out of position
Learned values lost in the control module memory

Symptoms

  • Brake or ABS warning lamp and message in the cluster
  • Brake lights or cruise control cancel react late or not at all
  • Regenerative braking or brake assist functions restricted

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–400
Time0.3–1.5 h

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

Parts involved

brake pedal sensor abrake control module

Related codes

C05C1C0619C0277C05D4

References: saabwisonline.com, static.nhtsa.gov, patents.google.com.