P0120
Sistema
Powertrain (Fuel/Air)
Escáner necesario
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.

Síntomas habituales

  • Limp mode
  • Idle surge
  • Reduced engine power

Causas típicas

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

¿Qué escáner necesita?

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

Use datos en vivo y freeze frame antes de cambiar piezas. Códigos ABS, SRS y U suelen requerir un escáner de todos los sistemas.

Consejos de diagnóstico

  • Registre el freeze frame cuando se active el código
  • Borre el código solo tras corregir la causa
  • Revise códigos pendientes relacionados
  • Verifique que la batería esté por encima de 12,4 V antes de sospechar sensores

Escáneres FOXWELL recomendados

Preguntas frecuentes

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.