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P0730
Systeem
Powertrain (Transmission)
Scanner vereist
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.

Veelvoorkomende symptomen

  • Slipping
  • Flare between gears
  • Transmission overheating smell

Typische oorzaken

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

Welke scanner heb je nodig?

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

Gebruik live data en freeze frame voordat je onderdelen vervangt. ABS-, SRS- en U-codes vereisen meestal een full-system scanner.

Diagnosetips

  • Leg freeze frame vast wanneer de code voor het eerst verschijnt
  • Wis de code pas na het oplossen van de oorzaak
  • Controleer op gerelateerde pending codes
  • Controleer of accuspanning boven 12,4 V is voordat je sensoren suspecteert

Aanbevolen TOPDON scanners

Veelgestelde vragen

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.