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Throttle Position Sensor Circuit Malfunction on BMW

BMW

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1 source
  • Official data (NHTSA)official_feed

What P0120 means

Caution — monitor closely

The throttle position sensor/switch circuit signal is out of range. Electronic throttle bodies on modern BMWs rarely fail outright, but connector corrosion is a recurring cause.

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General information, not a diagnosis or repair instruction. Always confirm with a qualified mechanic for your specific vehicle.

Common causes

  • Throttle Position Sensor Circuit Malfunction

What to check first

  1. Scan-tool live throttle position check
  2. Inspect throttle body wiring
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