Having problems with your 1998 Lexus Gs 400 ?

Evaporative Emmission System Malfuction----p0446

\015 My check engine light came on today with a code of P0446. Please help me understand what this code means. THANKS!\015 Posted / edited by AnonymousUser on : 14-01-2019

Answers :

Possible leaks, clogs, malfunctioning VSVs (vacuum switching valves), and faulty Evap charcoal canister. This system is designed to remove harmful vapors in the fuel system and preventing these vapors to enter the atmosphere, regulate fuel pressure, by sending it into the combustion chamber to be burnt.
\015\012Diagnostics for P0446:
\015\0121. Inspect vacuum hoses and pipes
\015\012between EVAP (Purge) VSV and
\015\012Charcoal Canister for leaks.
\015\0122. Replace Vapor Pressure VSV and
\015\012Hopefully this helps
You may need a shop manual for this.
Code 446 is a problem with the performance of the EVAP system. The computer applies a vac to the system and then watches how long it takes to drop to zero. Just about any component in the system including the hoses and gaskets could cause the code, including the vapor canister.
Repair Help & Product Troubleshooting for 1998 Lexus Gs 400

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