jdmshawn Posted March 20, 2011 Share Posted March 20, 2011 my 99 es300 is trowing out p0446 code and i bought a new gas cap , and i disconneted the battery for 30 seconds to rest the code and i drove it for 15 mile until it came back on with that same code p0446 , does that mean thats not whats was wrong with it? Quote Link to comment Share on other sites More sharing options...
PuddleJumper Posted March 20, 2011 Share Posted March 20, 2011 There is a prob in your vapor recovery system. I had same issue on my 02 Sienna. In my case and according to my research the most common cause is the VSV valve on the charcoal canister is bad. I replaced mine as a unit (valve and canister). Dealer can diagnose pretty easily. Quote Link to comment Share on other sites More sharing options...
jdmshawn Posted March 22, 2011 Author Share Posted March 22, 2011 oh and where is the VSV valve and the charcoal canister located on my 99 es300 Quote Link to comment Share on other sites More sharing options...
auto1bp Posted April 7, 2011 Share Posted April 7, 2011 oh and where is the VSV valve and the charcoal canister located on my 99 es300 i know on my wifes 97 es300 the charcoal canister is in the back near the fuel tank and where you put gas in, i would think that yours would be the same, the VSV should be close also.... also overfilling your gas tank can cause this code to go off as well as damage your charcoal canister. brad Quote Link to comment Share on other sites More sharing options...
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