P1128
Sistema
Powertrain (Throttle)
Escáner necesario
Enhanced OBD2 scanner (live data graphs, freeze frame, battery voltage test)

Throttle Control Motor Circuit Low (GM)

Understand P1128, common causes, and the right FOXWELL scanner to diagnose it.

GM throttle actuator motor circuit shorted low — common after throttle body cleaning if connector not seated.

Síntomas habituales

  • Engine power reduced
  • Pedal dead zone
  • Idle surge

Causas típicas

  • Short in TAC motor circuit
  • Failed throttle body
  • Water intrusion in connector

¿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 P1128 with a basic code reader?
P1128 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 P1128?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.