P0123critical severityPowertrain
Throttle/Pedal Position Sensor/Switch A Circuit High Input
on 2007 Mercedes-Benz S65 AMG 6.0L V12 BiTurbo M275 · RWD
What this code means
The TPS voltage is above the maximum threshold.
Symptoms
- Check Engine Light
- Limp mode
- High idle
- Sudden acceleration concern
Common causes
- Open circuit in TPS ground
- Short to voltage
- Faulty TPS
Diagnostic steps
- Test TPS voltage
- Check for open ground
- Check for shorts to power
Repair notes
Repair wiring or replace TPS. Safety concern - do not drive.
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