P1542high severityPowertrain
Accelerator Pedal Position Sensor Malfunction
on 2002 Mercedes-Benz SL 3.0L I6 · RWD
What this code means
The ECU detected a malfunction in the accelerator pedal position sensor. The signal does not correlate with expected values, affecting throttle control accuracy and safety.
Symptoms
- Check Engine Light
- Reduced power mode
- Poor throttle response
- Engine may only idle
- ETC warning light
Common causes
- Faulty accelerator pedal sensor
- Wiring damage to pedal sensor
- Corroded pedal connector
- Pedal sensor out of calibration
- ECU input circuit fault
Diagnostic steps
- Read accelerator pedal position values with scan tool
- Check both pedal sensor signals for proper tracking
- Inspect pedal connector and wiring
- Test sensor supply voltage
- Perform pedal adaptation
Repair notes
Replace the accelerator pedal module if the internal sensor has failed.
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P0010
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P0012
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P0013
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P0014
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P0015
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