P1544high severityPowertrain
Throttle Actuation Potentiometer Signal Too High
on 2014 Audi R8 5.2L V10 · AWD
What this code means
The ECU detected that the throttle actuation potentiometer signal voltage is higher than the maximum expected value. This may indicate an open ground circuit or sensor failure.
Symptoms
- Check Engine Light
- Limp mode with limited throttle
- Engine may idle only
- Erratic throttle response
Common causes
- Open ground wire to throttle body
- Faulty throttle position potentiometer
- Connector pin backed out
- Throttle body internal fault
- ECU reference voltage issue
Diagnostic steps
- Measure potentiometer signal voltage
- Check ground circuit continuity
- Inspect connector for backed-out pins
- Test reference voltage from ECU
- Compare both potentiometer readings
Repair notes
Repair the open circuit or replace the throttle body assembly.
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