P08ABClutch Pedal Position Sensor A Circuit Intermittent/Erratic
- 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
- P08AB is meant for a clutch pedal sensor A signal that jumps, drops out briefly or changes faster than a foot could move the pedal, without staying out of range long enough for the low or high codes. No manufacturer documents this code publicly. GM's published tables for the same sensor use only P08A8, P08A9, P08AA and P08AC, and its low/high checks need 400 of 500 bad samples, so short dropouts would go unnoticed there; Ford names only low, high and A/B correlation. CARB requires such inputs to be checked for circuit faults and plausibility. In practice the cause is usually a loose connector or a wire that breaks inside its insulation as the pedal moves. Start-stop and cruise control may cut out intermittently.
- What you may notice
- Start-stop or cruise control cutting out intermittently
- Warning lamp that comes and goes
- Erratic clutch pedal value in scan tool data while the pedal is held still
- Likely causes
- LikelyLoose or worn terminals in the pedal sensor connector
- LikelyWire breaking inside its insulation where the harness flexes with the pedal
- PossibleWorn sensor track causing signal dropouts at certain pedal positions
- RareMoisture or corrosion in the footwell connector
- 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 – €300
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.