OBD-II code · Powertrain (generic)
P08AC Clutch Pedal Position Sensor A Not Learned
The clutch pedal position sensor A reports a not learned fault. Pedal position cannot be measured reliably.
Is it safe to drive with P08AC?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyAdaptation lost after battery disconnect
- PossibleSensor replaced without learn procedure
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–2 h
- Emissions test
- Usually unaffected
- Parts involved
- Clutch Pedal Position Sensor A, Wiring Harness, Ecm
Related codes
- P08A9Clutch Pedal Position Sensor A Circuit Low
- P08AAClutch Pedal Position Sensor A Circuit High
- P08ABClutch Pedal Position Sensor A Circuit Intermittent/Erratic
- P08ADNeutral Position Sensor B Circuit/Open
- P08AENeutral Position Sensor B Circuit Range/Performance
- P08AFNeutral Position Sensor B Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.