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Home >> Infiniti >> 2013 >> M37 Base >> Repair and Diagnosis >> Transmission >> Automatic Transmission >> DTC/Circuit Diagnosis >> DTC P0731: 1GR Incorrect Ratio >> DTC Logic >> DTC Detection Logic
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DTC Detection Logic

DTC Trouble diagnosis name DTC is detected if... Possible cause
P0731 Gear 1 Incorrect Ratio The gear ratio is:
  • 5.069 or more
  • 4.496 or less
  • Input clutch solenoid valve
  • Direct clutch solenoid valve
  • High and low reverse clutch solenoid valve
  • Front brake solenoid valve
  • Low brake solenoid valve
  • 2346 brake solenoid valve
  • Anti-interlock solenoid valve
  • Each clutch and brake
  • Output speed sensor
  • Input speed sensor 1, 2
  • Hydraulic control circuit