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HOMESERVICE MANUALSHYUNDAI2009TUCSON LIMITED, 2.0 BREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMDTC TROUBLESHOOTING PROCEDURES (2.0L)TROUBLESHOOTING FOR DTCP0455 EVAPORATIVE EMISSION SYSTEM-LEAK DETECTED (LARGE LEAK)DTC DETECTING CONDITION
2009 Hyundai Tucson Limited, 2.0 B

P0455 Evaporative Emission System-Leak detected (Large leak): DTC Detecting Condition

2009 Hyundai Tucson Limited, 2.0 BSECTION DTC Detecting Condition
Item Detecting Condition Possible Cause
DTC Strategy
  • Monitor the fuel tank's vacuum
  • Fuel Filler Cap missing
  • Leakage in each hose/fuel filler pipe
  • Leakage in CCV/Canister/Fuel tank
  • Stuck in each purge hose/pipe between fuel tank and intake manifold
Enable Conditions
  • 10 V < Battery voltage < 16 V
  • Barometric pressure > 72 kPa (0.72 bar)
  • Engine coolant temperature at startup - Intake air temperature at startup < 6.7°C (12°F)
  • Engine coolant temperature at startup: 4.5 ~ 35°C (40 ~ 95°F)
  • Intake air temperature at startup: 4.5 ~ 35°C (40 ~ 95 °F)
  • Fuel level: 15 ~ 85%
Threshold Value
  • Fuel tank's vacuum < a prescribed threshold
Diagnosis Time
  • One time during Evaporative system diagnosis
MIL On Condition
  • 1 driving cycle
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.