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P0791
Sistema
Powertrain (Transmission)
Scanner richiesto
Full-system scanner (engine, ABS, SRS, transmission, service resets)

Intermediate Shaft Speed Sensor Circuit Malfunction

Understand P0791, common causes, and the right TOPDON scanner to diagnose it.

Intermediate shaft speed sensor circuit fault on multi-shaft automatics.

Sintomi comuni

  • Harsh shifts
  • Trans limp
  • Incorrect ratio codes

Cause tipiche

  • Failed ISS sensor
  • Wiring in transmission
  • Internal tone ring damage

Di quale scanner hai bisogno?

Full-system scanner (engine, ABS, SRS, transmission, service resets)

Usa dati live e freeze frame prima di sostituire componenti. I codici ABS, SRS e U richiedono di solito uno scanner full-system.

Consigli diagnostici

  • Registra il freeze frame quando compare il codice
  • Cancella il codice solo dopo aver risolto la causa
  • Controlla codici pending correlati
  • Verifica che la batteria sia sopra 12,4 V prima di sospettare i sensori

Scanner TOPDON consigliati

Domande frequenti

What does P0791 mean?
P0791 indicates intermediate shaft speed sensor circuit malfunction. Intermediate shaft speed sensor circuit fault on multi-shaft automatics.
Can I diagnose P0791 with a basic code reader?
P0791 may set in the engine module, but related diagnostics often benefit from an enhanced or full-system scanner with live data and freeze frame.
Which TOPDON scanner do I need for P0791?
Full-system scanner (engine, ABS, SRS, transmission, service resets) See recommended tools on this page.
Is it safe to drive with P0791?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.