Chassis, generic

C0277 Brake Pedal Position Sensor Circuit

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

The publicly available J2012 tables omit C0277; GM assigns it to the brake pedal position sensor, not for a booster vacuum sensor. In the 2011 Saab 9-4X the body module watches the sensor with 9 to 16 V supply and the brake applied: failure type 06 means the signal or 5 V reference line is grounded or interrupted, 07 that a line touches battery voltage or the low reference is open, 09 a signal changing too fast, 4B a sensor whose rest position was never learned. GM bulletin 19-NA-202 for the 2016 to 2019 Malibu lists the same subcodes and fixes false C0277 with brake module software; PIT5181A for 2012 to 2014 full-size trucks points to connector X205. Effects include dead stop lamps, cruise control faults and a Service Stabilitrak message.

Likely causes

Loose, backed-out or bent terminals in the sensor connector or GM connector X205
Short or open in signal, 5 V reference or low reference wire
Brake module software (GM 19-NA-202) or rest position not learned

Symptoms

  • Rear stop lamps inoperative
  • Service Stabilitrak message, traction control lamp on
  • Cruise control cannot be set or drops out

Repair estimate

DifficultyMediumDIY possible
Parts and labour€0–300
Time0.3–1.5 h

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

Parts involved

brake pedal position sensorbody control modulebrake control module

Related codes

C0161C05C0C0230C0595

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