C0277 on Pontiac

Brake pedal position sensor fault (GM)

Severity: Inspect soon

The code can leave stop lamps working wrongly and disable cruise and stability control; an owner reported a crash with constant brake lights.

It gets more serious if:

Stop: Stop and have the vehicle inspected if a red BRAKE warning light comes on or the brake pedal feels different.

Safety-critical system: explanation only, no DIY steps. Source: how we rate severity

This page covers only what differs on Pontiac. For what C0277 means, the ranked causes and the test order, see the C0277 guide.

What's different on Pontiac

Pontiac

2008 · G6
Supported by vehicle data
A G6 owner had C0277 read as the pedal position sensor and the problem returned after replacement. Based on complaints.

Sources and review

NHTSA complaint ODI 10400984: 2008 Pontiac G6, C0277 brake pedal position sensor — NHTSA Office of Defects Investigation
Chevrolet SB-08-05-22-009A: CHEVROLET/PONTIAC/SATURN: INTERMITTENTLY BRAKE LIGHTS (STOP LAMPS) DO NOT FUNCTION CORREC — NHTSA manufacturer communications (flat file, NHTSA ID 10032206)

Last reviewed: October 16, 2026
Written by: Saurabh K.
Editorial review: Pending
Technician review: Technician review pending

This page explains what a code usually means; it is not a substitute for a professional inspection. How we source and review · Report an error