P08B5Clutch Pedal Position Sensor B Circuit Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P08B5 covers a second clutch pedal sensor whose signal lies within its electrical limits but is implausible on its own, for example stuck at one value while the pedal moves or not matching the driving state. No manufacturer documents this code publicly. Ford's dual PWM pedal sensor layout files any disagreement between the two channels under P08B9 rather than a B-only plausibility code, and GM applies the comparable in-gear plausibility check only to sensor A (P08A8: error above 4 % while a gear is engaged). CARB requires plausibility monitoring for inputs used by other diagnostics. If a manufacturer uses it, expect start-stop to be disabled; the clutch itself keeps working because it is hydraulically operated.
- What you may notice
- Warning lamp on
- Start-stop or cruise control unavailable
- Likely causes
- LikelySensor B drifting or worn so its value no longer follows pedal travel
- PossibleSensor loose or misaligned on the pedal bracket
- PossibleCorrosion adding resistance in the sensor B circuit
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €50 – €350
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.