Powertrain, generic · Transmission

P08AA Clutch Pedal Position Sensor A Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

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.

Likely causes

Open sensor ground wire or corroded ground pin
Signal wire shorted to the 5 V reference or to battery voltage
Failed clutch pedal position sensor A
Faulty sensor input in the engine control module

Symptoms

  • Malfunction indicator lamp on after one trip
  • Start-stop and cruise control disabled
  • Clutch status shown incorrectly in scan tool data

Repair estimate

DifficultyEasyDIY possible
Parts and labour€50–300
Time0.3–1.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

clutch pedal position sensor awiring harnessecm

Related codes

P08A9P08A7P08A8P08B7P0808

References: gsi.ext.gm.com, gsi.ext.gm.com, fordservicecontent.com.