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DTC Detecting Condition and Trouble Area

DTC DETECTING CONDITION CHART

DTC detecting condition Trouble area
P0449: Evaporative Emission System Vent Valve/Solenoid Circuit 
This DTC is detected if any one of the following conditions is met.
  • Output voltage of EVAP vent valve drive circuit is lower than 3 V for 5 sec. when vent valve is OFF (OPEN).
  • Electric current of EVAP vent valve drive circuit is higher than 1.5 A for 5 sec. even if vent valve is ON (CLOSE).

(2 D/C detection logic)
  • EVAP vent valve and/or its circuit
  • ECM
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