Chassis, generic

C0202 Brake Pedal Position Sensor

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

No accessible J2012 list, NHTSA bulletin or maker index mentions C0202; the code is publicly unverifiable, and C0230 carries an almost identical title. A brake pedal position sensor reports how far the pedal moves instead of a mere on/off state. GM patented a resistive design with two outputs: one goes to the engine module for diagnosis, the other to the brake module, which uses it to release the shift interlock. Besides out-of-range checks, GM looks for faults inside the valid range by weighting how much the reading changes while the interlock is released. Bosch's PWG travel sensor works without contact through a Hall element and sends two PWM signals so the control unit can compare them. Such sensors are needed above all where braking is blended with energy recovery.

Likely causes

Worn, misadjusted or not relearned pedal position sensor
Loose or corroded connector at the pedal
Pedal bracket or return spring binding

Symptoms

  • Brake or stability warning lamp on
  • Shift lever cannot be moved out of park, cruise control inactive

Repair estimate

DifficultyMediumDIY possible
Parts and labour€40–350
Time0.3–1.5 h

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

Parts involved

brake pedal position sensorbrake control modulebrake pedal assembly

Related codes

C0230C0042C0075

References: patents.google.com, eenewseurope.com.