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P0731
System
Powertrain (Transmission)
Wymagany skaner
Full-system scanner (engine, ABS, SRS, transmission, service resets)

Gear 1 Incorrect Ratio

Understand P0731, common causes, and the right TOPDON scanner to diagnose it.

First gear ratio does not match commanded — slipping clutch pack or low fluid.

Typowe objawy

  • Slipping from stop
  • Flare on 1-2 shift
  • Trans overheating

Typowe przyczyny

  • Low ATF
  • Worn 1st clutch
  • Failed solenoid
  • Valve body wear

Jakiego skanera potrzebujesz?

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

Użyj danych na żywo i freeze frame przed wymianą części. Kody ABS, SRS i U zwykle wymagają skanera full-system.

Wskazówki diagnostyczne

  • Zapisz freeze frame, gdy pojawi się kod
  • Kasuj kod dopiero po usunięciu przyczyny
  • Sprawdź powiązane kody pending
  • Sprawdź, czy napięcie akumulatora jest powyżej 12,4 V przed podejrzeniem czujników

Polecane skanery TOPDON

Często zadawane pytania

What does P0731 mean?
P0731 indicates gear 1 incorrect ratio. First gear ratio does not match commanded — slipping clutch pack or low fluid.
Can I diagnose P0731 with a basic code reader?
P0731 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 P0731?
Full-system scanner (engine, ABS, SRS, transmission, service resets) See recommended tools on this page.
Is it safe to drive with P0731?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.