P0120
System
Powertrain (Fuel/Air)
Scanner som krävs
Enhanced OBD2 scanner (live data graphs, freeze frame, battery voltage test)

Throttle/Pedal Position Sensor/Switch A Circuit Malfunction

Understand P0120, common causes, and the right FOXWELL scanner to diagnose it.

Throttle position sensor A circuit fault on drive-by-wire or cable throttle.

Vanliga symptom

  • Limp mode
  • Idle surge
  • Reduced engine power

Typiska orsaker

  • Failed TPS
  • Dirty throttle body
  • Wiring at throttle actuator
  • Needs throttle relearn

Vilken scanner behöver du?

Enhanced OBD2 scanner (live data graphs, freeze frame, battery voltage test)

Använd live-data och freeze frame innan du byter delar. ABS-, SRS- och U-koder kräver oftast en fullsystems-scanner.

Diagnostiktips

  • Spara freeze frame när koden först sätts
  • Rensa koden först efter att orsaken är åtgärdad
  • Kontrollera relaterade väntande koder
  • Verifiera batterispänning över 12,4 V innan du misstänker sensorer

Rekommenderade FOXWELL-scannrar

Vanliga frågor

Can I diagnose P0120 with a basic code reader?
P0120 may set in the engine module, but related diagnostics often benefit from an enhanced or full-system scanner with live data and freeze frame.
Is it safe to drive with P0120?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.