Brake Pedal Position Sensor A and B Correlation
Brake-by-wire and electronic brake systems use two redundant pedal position sensors. Their readings disagree by more than the diagnostic tolerance - one or both has drifted, or wiring picks up noise on one channel.
Affected components
- Brake pedal position sensor a
- Brake pedal position sensor b
Common causes
- High likelihood: One sensor has drifted out of tolerance
Diagnostic notes
- The malfunction indicator lamp may illuminate
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.