P2109high severityPowertrain
Throttle/Pedal Position Sensor A Minimum Stop Performance
on 2005-2011 Audi A6 4.2L V8 · AWD
What this code means
The throttle position sensor is not reading the expected minimum (closed) stop value. This indicates a mechanical or electrical issue with the throttle body sensor A range.
Symptoms
- Check engine light on
- Erratic or high idle
- Reduced power / limp mode
Common causes
- Dirty or carbon-fouled throttle body
- Faulty throttle position sensor A
- Wiring or connector fault
- Mechanical throttle blade binding
Diagnostic steps
- Scan code and view TPS live data
- Clean throttle body and recheck
- Inspect TPS wiring and connectors
- Perform throttle relearn or replace sensor
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