P08AA code meaning
Clutch Pedal Position Sensor A Circuit High
Powertrain system Generic code P08xx codes Check engine light
What P08AA means
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.
P08AA at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyEasy, DIY possible
- Typical labor0.3 to 1.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P08AA
- Malfunction indicator lamp on after one trip
- Start-stop and cruise control disabled
- Clutch status shown incorrectly in scan tool data
Common causes of P08AA
- Most 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
- Less likelyFaulty sensor input in the engine control module
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Clutch pedal position sensor aWiring harnessECM
What each part of P08AA means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 8 | Area: transmission. |
| AA | The exact fault in that area. |
What to do next
- Note P08AA and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P08AA
What does P08AA mean?
P08AA means "Clutch Pedal Position Sensor A Circuit High". P08AA is the mirror image of P08A9: the pedal sensor signal climbs into the upper dead band that a healthy sensor never reaches. It is a generic code, so it means the same on every make.
Is it safe to drive with P08AA?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P08AA fail an emissions test?
Yes, it can. P08AA is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P08AA to fix?
Difficulty: easy. A typical repair takes 0.3 to 1.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P08AA clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.