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Home >> Toyota >> 2011 >> Highlander Hybrid Limited >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 70 (Engine Control System (2GR-FE) (Diagnostic Codes (P00351-P1603) & Circuit Tests)) >> SFI System >> DTC P0441: Evaporative Emission Control System Incorrect Purge Flow >> DTC Summary

DTC Summary

WARNING: This page is about a different variant/trim than selected.
DTCs Monitoring Item Malfunction Detection Condition Trouble Area Detection Timing Detection Logic
P0441 Purge VSV (Vacuum Switching Valve) stuck open Leak detection pump creates negative pressure (vacuum) in EVAP system and EVAP system pressure is measured. 0.02 inch leak pressure standard is measured at start and end of leak check.
If stabilized pressure is higher than [second 0.02 inch leak pressure standard x 0.2], ECM determines that purge VSV is stuck open
  • Purge VSV
  • Purge VSV circuit (between purge VSV and ECM)
  • Leakage from EVAP line (between purge VSV and intake manifold)
  • EVAP line clogged (between purge VSV and canister)
  • ECM
 While ignition switch off 2 trip
P0441 Purge VSV stuck closed After EVAP leak check is performed, purge VSV is turned ON (open), and atmospheric air is introduced into EVAP system. 0.02 inch leak pressure standard is measured at the start and end of leak check.
If pressure does not return to near atmospheric pressure, ECM determines that purge valve is stuck closed		 While ignition switch off 2 trip
P0441 Purge flow While engine running, the following conditions are successively met:
  • Negative pressure is not created in EVAP system when purge VSV is turned ON (open)
  • EVAP system pressure change is less than 0.4 kPa (3.0 mmHg) when vent valve is turned ON (closed)
  • Atmospheric pressure change before and after purge flow monitor is less than 0.1 kPa (0.75 mmHg)
 While ignition switch off 2 trip
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