P08AAClutch Pedal Position Sensor A Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P08AA is the mirror image of P08A9: the pedal sensor signal climbs into the upper dead band that a healthy sensor never reaches. GM's threshold is above 96 % of the 5 V reference for 400 of 500 samples at 12.5 ms, engine not cranking, system voltage above 9 V; Type A, MIL after one trip. It replaced GM's pre-2018 P0808 and appears in the LV7, 2019 Corvette ZR1 and 2018 OBDG04 tables. Ford's 2020–23 gasoline summary lists P08AA for both its dual PWM and single analog clutch pedal sensor layouts, flagged in under a second. A lost sensor ground or a signal shorted to the reference are the usual triggers. Sensor B high is P08B7; the driver mostly loses start-stop and cruise control.
- What you may notice
- Malfunction indicator lamp on after one trip
- Start-stop and cruise control disabled
- Clutch status shown incorrectly in scan tool data
- Likely causes
- LikelyOpen sensor ground wire or corroded ground pin
- PossibleSignal wire shorted to the 5 V reference or to battery voltage
- PossibleFailed clutch pedal position sensor A
- RareFaulty sensor input in the engine control module
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Easy · 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.