C0277Brake Pedal Position Sensor Circuit
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- 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.
- What you may notice
- Rear stop lamps inoperative
- Service Stabilitrak message, traction control lamp on
- Cruise control cannot be set or drops out
- Likely causes
- LikelyLoose, backed-out or bent terminals in the sensor connector or GM connector X205
- PossibleShort or open in signal, 5 V reference or low reference wire
- PossibleBrake module software (GM 19-NA-202) or rest position not learned
- Repair
- Medium · Often possible to do yourself.Typical cost: €0 – €300
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.