LEMON Manuals: Even more car manuals for everyone
Home >> Hyundai >> 2015 >> Sonata Eco >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 65 (Automatic Transaxle System Diagnosis (HEV)) >> DTC P0734: Gear 4 Incorrect Ratio >> General Information >> DTC Detecting Condition

General Information: DTC Detecting Condition

WARNING: This page is about a different variant/trim than selected.
Item Detecting Condition Possible Cause
DTC Strategy
  • 4th gear incorrect gear ration
  1. Input speed sensor fault
  2. Output speed sensor fault
  3. Clutch slip in Transmission (UD brake, OD clutch) or oil pressure controller fault
Enable Conditions
  • Solenoid power voltage> 10V
  • ATF temperature Sensor > -10°C(23.8°F)
  • Time after shift changing finish > 1sec.
  • Input speed > 400rpm
  • Output speed >200rpm
  • Time after TCM turns on > 1sec.
  • Shift stage 4th. gear
  • TR switch = "D" range
Threshold Value
  • Output speed>(input speed+200rpm)/4th. gear ratio
  • Output speed<(input speed-200rpm)/4th. gear ratio
Diagnostic Time
  • 1 sec. and 4 times
Fail safe
  • Locked into 4th gear