P2106high severityPowertrain
Throttle Actuator Control System Forced Limited Power
on 2004-2006 Audi A8 4.2L V8 · AWD
What this code means
ECM has limited engine power output due to a detected throttle system malfunction.
Symptoms
- Reduced acceleration
- Check engine light
- Wrench/power limit warning
Common causes
- Throttle position disagreement
- APP sensor intermittent
- Throttle body degraded
Diagnostic steps
- Check for companion DTCs
- Monitor APP vs TPS correlation
- Test throttle response
Repair notes
Address underlying throttle system fault to restore full power.
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