MIL ON - DTC P0441, P0446 (EVAP Control System)
ENGINEEG003-98
April 3, 1998
Title:
EVAP SYSTEM DIAGNOSIS: P0441 / P0446
Models:
RAV4, Tercel, Paseo, Camry, Avalon,
Tacoma, 4Runner, T-100
Introduction
The following procedure is recommended for repair of MIL "ON" conditions involving confirmed DTC P0441 and P0446.
Affected Vehicles
- All RAV4, Tercel, Paseo, Camry, Avalon, Tacoma, 4Runner, T-100 that display codes Vehicles P0441 or P0446.
Repair Procedure
A. Diagnostics for PO441:
1. Remove Vacuum Hoses between EVAP [1][2][3]VSV and Charcoal Canister and discard.
2. If there is a metal vapor pipe between EVAP [1][2][3]VSV and Charcoal Canister, clean inside of vapor pipe
3. Replace EVAP [1][2][3]VSV and Charcoal Canister assembly with new parts.
4. Install new vacuum hoses between EVAP [1][2][3]VSV and Charcoal Canister.
B. Diagnostics for P0446:
1. Inspect vacuum hoses and pipes between EVAP (Purge) [1][2][3]VSV and Charcoal Canister for leaks.
2. Replace Vapor Pressure VSV and Canister.
NOTE:
When performing diagnostics for an occurrence of a MIL "ON" condition, Diagnostic Trouble Code (DTC) P0441 may be result of debris in Evaporative Emission Control System. This may cause blockage of a vapor line, or a stuck [1][2][3]VSV, as described in troubleshooting area of Repair Manual.
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