Toyota RAV4 Evap System Diagnosis: P0441/P0446
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confirmed DTC P0441 and P0446. S All RAV4, Tercel, Paseo, Camry, Avalon, Tacoma, 4Runner, T–100 that display codes P0441 or P0446. A. Diagnostics for P0441: 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:
confirmed DTC P0441 and P0446. S All RAV4, Tercel, Paseo, Camry, Avalon, Tacoma, 4Runner, T–100 that display codes P0441 or P0446. A. Diagnostics for P0441: 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.
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