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P0730
Sistema
Powertrain (Transmission)
Scanner richiesto
Full-system scanner (engine, ABS, SRS, transmission, service resets)

Incorrect Gear Ratio

Understand P0730, common causes, and the right TOPDON scanner to diagnose it.

TCM commanded a gear but actual ratio does not match — slipping clutch packs, low fluid, or failed solenoid.

Sintomi comuni

  • Slipping
  • Flare between gears
  • Transmission overheating smell

Cause tipiche

  • Low ATF level
  • Worn clutch packs
  • Failed solenoid
  • Valve body wear

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 P0730 mean?
P0730 indicates incorrect gear ratio. TCM commanded a gear but actual ratio does not match — slipping clutch packs, low fluid, or failed solenoid.
Can I diagnose P0730 with a basic code reader?
P0730 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 P0730?
Full-system scanner (engine, ABS, SRS, transmission, service resets) See recommended tools on this page.
Is it safe to drive with P0730?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.