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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 P0455: Evaporative Emission System-Leak Detected (Large Leak) >> DTC Information >> DTC Detecting Condition

DTC Information: DTC Detecting Condition

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Item Detecting Condition Possible cause
DTC Strategy
  • Check fuel tank under pressure during evacuation
  1. Fuel Filler Cap missing
  2. Leakage in each hose/fuel filler pipe
  3. Leakage in CCV/Canister/Fuel tank
  4. Stuck in each purge hose/pipe between fuel tank and intake manifold
Enable Conditions
  • Coolant temperature is higher than 50°C (122°F)
  • Ambient Air Temperature (AAT) is higher than -10°C (14°F)
  • Vehicle speed is slower than 12 km/h (7.5 mph)
  • Fuel level is less than 85%
  • Time after engine starts has passed 100 second.
  • Ambient pressure is greater than 75 kPa
Case 1 Threshold value
  • Time to generate under pressure (is less than -15 hPa) is greater than 20 sec. (too long)
Diagnosis Time
  • 25 sec. in Idle when all Enable Conditions fulfilled
Case 2 Threshold value
  • Time for DTP to decrease from -300 Pa (-3 hPa) to -700 Pa (-7 hPa) during Evacuation is greater than 10 sec.
Diagnosis Time
  • 15 sec. in Idle when all Enable Conditions fulfilled
MIL On Condition
  • 2 Driving Cycles