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DTC P0497 EVAP. Emission System-Low Purge Flow: DTC Detecting Condition

DTC DETECTING CONDITION AND POSSIBLE CAUSES

Item Detecting Condition Possible Cause
DTC Strategy
  • Fuel tank pressure behavior (Canister purge valve stuck check)
  • Clog on the fuel Evaporative system hose
  • PCSV
  • ECM/PCM
Enable Conditions
  • Time after engine start > 600sec.
  • Idle speed controller activated
  • Mixture adaptation activated
  • Coolant temperature at start - ambient temperature < 6.6°C (11.88°F)
  • Ambient temperature: 4~35°C (39.2 - 95°F)
  • Ambient pressure > 680hPa (10 lbf/in2 )
  • Fuel level: 6.45~38.7 L (1.7~10.2 gal)
  • Tank ventilation must be active > 10sec.
  • No misfire
Threshold Value
  • Reference value of differential tank pressure > 5hPa (10.443 lbf/ft2 )
Diagnostic Time  
MIL ON Condition
  • 2 driving cycle