FixVault

DTC P0731:00: Notes

DTC P0731:00 Gear 1 incorrect ratio
DETECTION CONDITION 
  • Under the following conditions, input shaft and output shaft rotation ratio is 2.157 or less for 4 times
    • Selector lever position is D or M position
    • Gear position is 1GR
    • Accelerator pedal position is 3.87% or more

    Diagnostic support note 

  • The check engine light does not illuminate.
  • The automatic transaxle warning light illuminates if the TCM detects the above malfunction condition during the first drive cycle.
  • PENDING CODE is not available.
  • FREEZE FRAME DATA is not available.
  • The DTC is stored in the TCM memory.
FAIL-SAFE FUNCTION 
  • Inhibits 1GR
  • Inhibits feedback control
POSSIBLE CAUSE 
  • Deteriorated ATF
  • ATF level low
  • Solenoid valve malfunction
    • Pressure control solenoid A
    • Shift solenoid A
  • Line pressure malfunction
  • Stall speed malfunction
  • Forward clutch slipping
  • One-way clutch No. 1 slipping
  • Primary control valve body malfunction
  • TCM malfunction
SYSTEM WIRING DIAGRAM  -