DTC P0441, DTC P0442, DTC P0446 Or DTC P0456:: Notes
WARNING: This page is about a different car, the 2003 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
Code Definition
- DTC P0441: EVAP Emission Control System Incorrect Purge Flow
- DTC P0442: EVAP Emission Control System Leak Detected (Small Leak)
- DTC P0446: EVAP Emission Control System Vent Control Circuit
- DTC P0456: EVAP Emission Control System Leak Detected (Very Small Leak)
CAUTION:
If Engine Control Module (ECM) replacement is instructed in following test, always ensure ECM electrical connectors and ground circuits are okay. If either are defective, repair and repeat testing to confirm ECM malfunction. On models equipped with engine immobilizer, if ECM is replaced, ECM must be programmed with proper ignition key code for engine immobilizer system. For programming procedures, see COMPUTER RELEARN PROCEDURES - TOYOTA
article in GENERAL INFORMATION, or appropriate ENGINE IMMOBILIZER SYSTEMS article in ACCESSORIES & EQUIPMENT.
NOTE:
This DTC may be caused by a loose or improperly installed fuel tank cap. If DTCs P0441, P0446, P0450 or P0451 is output after DTC P0440 or DTC P0442, perform appropriate test for these DTCs first before performing test for DTC P0440 or DTC P0442.