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P0845
Sistema
Powertrain (Transmission)
Scanner richiesto
Full-system scanner (engine, ABS, SRS, transmission, service resets)

Transmission Fluid Pressure Sensor/Switch B Circuit Malfunction

Understand P0845, common causes, and the right TOPDON scanner to diagnose it.

Secondary line pressure sensor circuit fault.

Sintomi comuni

  • Shift problems
  • Check engine light

Cause tipiche

  • Failed pressure sensor B
  • Internal trans harness
  • Valve body issue

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 P0845 mean?
P0845 indicates transmission fluid pressure sensor/switch b circuit malfunction. Secondary line pressure sensor circuit fault.
Can I diagnose P0845 with a basic code reader?
P0845 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 P0845?
Full-system scanner (engine, ABS, SRS, transmission, service resets) See recommended tools on this page.
Is it safe to drive with P0845?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.