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Home >> Hyundai >> 2017 >> Sonata Base >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 42 (Engine Control System Diagnosis - 2.0L (2 Of 3) (Except HEV)) >> DTC P0456: Evaporative Emission System-Leak Detected (Very Small Leak) >> DTC Information >> DTC Detecting Condition

DTC Information: DTC Detecting Condition

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Item Detecting Condition Possible cause
DTC Strategy
  • Monitoring Fuel Tank Pressure Trend after generating under pressure in Tank
  1. Leakage in each hose/fuel filler pipe
  2. Leakage in CCV/Canister/Fuel tank/Fuel Filler Cap
Enable Conditions
  • Pedal value is less than 0.01%
  • Differential fuel tank Pressure between -1100 Pa and 400 Pa
  • Vehicle speed is greater than 15 mph during 150 secs
  • Time since last EVAP monitoring longer than 60 sec
  • Barometric pressure gradient is less than 7.5 kPa
  • Battery voltage is greater than 10 V
  • Mass air flow deviation during waiting and leakage check period is less than 1389 mg/stk
Threshold value
  • Leak diameter is between 0.4 mm (0.015 in) and 0.8 mm (0.03 in)
Diagnosis Time
  • 30 sec.
MIL On Condition
  • 2 Driving Cycles