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Home >> Toyota >> 2013 >> Matrix Base, Standard Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 19 (Engine Control System (2AZ-FE) (Diagnostic Codes (P0010-P0456))) >> SFI System >> DTC P0441: Evaporative Emission Control System Incorrect Purge Flow >> DTC Summary
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DTC Summary

WARNING: This page is about a different variant/trim than selected.
DTC No. 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 measured. Reference pressure is measured at start and at end of leak check.
If stabilized pressure higher than [second reference pressure x 0.35], ECM determines that purge VSV stuck open.
  • Purge VSV
  • Connector/wire harness (purge VSV - ECM)
  • ECM
  • Canister pump module
  • Leak from EVAP system
While ignition switch off 2 trip
Purge VSV stuck closed After EVAP leak check performed, purge VSV turned on (open), and atmospheric air introduced into EVAP system. Reference pressure is measured at start and at end of check.
If pressure does not return to near atmospheric pressure, ECM determines that purge VSV stuck closed.
  • Purge VSV
  • Purge line
  • Connector/wire harness (purge VSV - ECM)
  • ECM
  • Canister pump module
  • Canister (filter inside canister clogged)
  • Leak from EVAP system
While ignition switch off 2 trip
Purge flow While engine running, following conditions successively met:
  • Negative pressure not created in EVAP system when purge VSV turned on (open)
  • EVAP system pressure change less than 0.4 kPa(gauge) [3.0 mmHg(gauge)] when vent valve turned on (closed)
  • Atmospheric pressure change before and after purge flow monitor less than 0.1 kPa(gauge) [0.75 mmHg(gauge)]
  • Purge VSV
  • Purge line
  • Connector/wire harness (purge VSV - ECM)
  • ECM
  • Canister pump module
  • Canister (filter inside canister clogged)
  • Leak from EVAP system
While engine running 2 trip