Home Tips & Tricks Evap System Diagnosis: P0441/P0446 Tacoma/4Runner

Evap System Diagnosis: P0441/P0446 Tacoma/4Runner

118

Download MIL ON – DTC P0441, P0446 (EVAP Control System) 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 VSV and Charcoal Canister and discard. 2. If there is a metal vapor pipe between EVAP VSV and Charcoal Canister, clean inside of vapor pipe 3. Replace EVAP VSV and Charcoal Canister assembly with new parts. 4. Install new vacuum hoses between EVAP VSV and Charcoal Canister. B. Diagnostics for P0446: 1. Inspect vacuum hoses and pipes between EVAP (Purge) 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 VSV, as described in troubleshooting area of Repair Manual.