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DTC Summary

DTC DETECTION CONDITION AND TROUBLE AREA REFERENCE CHART

DTC No. Monitoring Item DTC Detection Condition Trouble Area Detection Timing Detection Logic
P0441 Purge VSV (Vacuum Switching Valve) stuck open Vacuum pump creates negative pressure (vacuum) in EVAP system and EVAP system pressure measured. 0.02 inch leak pressure standard measured at start and at end of leak check.
If stabilized pressure higher than [second 0.02 inch leak pressure standard x 0.2], ECM determines that EVAP VSV stuck open
  • Purge VSV
  • Connector/wire harness (Purge VSV - ECM)
  • ECM
  • Canister pump module
  • Leakage from EVAP system
 While ignition switch off 2 trip
P0441 Purge VSV stuck closed After EVAP leak check performed, Purge VSV turned ON (open), and atmospheric air introduced into EVAP system. 0.02 inch leak pressure standard measured at start and at end of the check.
If pressure does not return to near atmospheric pressure, ECM determines that purge valve stuck closed
  • Purge VSV
  • Connector/wire harness (Purge VSV - ECM)
  • ECM
  • Canister pump module
  • Leakage from EVAP system
 While ignition switch off 2 trip
P0441 Purge flow While engine running, following conditions are successively met:
  • Negative pressure not created in EVAP system when Purge VSV turned ON (open)
  • EVAP system pressure change less than 0.5 kPa (3.75 mmHg) when vent valve turned ON (closed)
  • Atmospheric pressure change before and after purge flow monitor less than 0.1 kPa (0.75 mmHg)
  • Purge VSV
  • Connector/wire harness (Purge VSV - ECM)
  • Leakage from EVAP line (Purge VSV - Intake manifold)
  • ECM
 While engine running 2 trip
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