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HOMESERVICE MANUALSHYUNDAI2003XG350 LREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROL SYSTEM DIAGNOSIS (2 OF 2)DIAGNOSTIC TESTSDTC P0456: EVAP EMISSION SYSTEM - LEAK DETECTED (VERY SMALL LEAK)GENERAL INFORMATIONDTC DETECTING CONDITION
2003 Hyundai XG350 L

General Information: DTC Detecting Condition

2003 Hyundai XG350 LSECTION DTC Detecting Condition
DTC DETECTING CONDITION CHART

Item Detecting Condition Possible cause
DTC Strategy
  • Small leakage (0.02")
  • Leakage at Vapor Hose
  • Leakage at PCSV
  • Leakage at CCV
  • Leakage at Canister
  • Leakage at fuel tank
  • Faulty PCM
Enable Conditions
  • 15% < Fuel Level < 85%
  • Fuel Temperature is less than or equal to 40°C (104°F)
  • Vehicle speed < 60 km/h (37 mph)
  • Purge Factor > 0.85
  • Fuel Tank Pressure: 1.0-3.2V
  • Engine coolant temperature < 60°C (140°F)
  • Intake air temperature < 60°C (140°F)
Threshold value
  • Change of Fuel tank pressure after a certain circumstance is less than or equal to Threshold value (function of pressure and temperature) (change in P = (Preal-P3) - k(P2-P1))
Diagnosis Time
  • 70 sec. After Purge
MIL On Condition
  • 2 driving cycles
RENDER: 1.0x

NO RELATED

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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.