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Discussion Starter · #1 ·
I have a 2001 Tundra and it has the P0441 and P0446 codes pertaining to the EVAP system. To those who have had these codes pop up (or have experience with this) could you fill me in on what you did to fix it?

I've checked and replaced all the hoses I can find with cracks. A shop I brought it to supposedly smoke tested for leaks, and they said no leaks. But I found two more hoses with obvious cracks after the fact and replaced those. I tested the vsv's with a 9v battery to make sure they are still switching. Replaced the gas cap. Still getting the same codes. Also, not sure if this has anything to do with it, but my fuel gauge does not work. the low fuel indicator works though.

Here is all the information I got from my scan tool:
View attachment Tundra scan 1 report.PDF
Can someone provide me with the EVAP system diagram? Or provide a link?

Thanks in advance!
 

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I know this is very generic, but have you tried changing your gas cap? I've had these codes come up once before and it was because of a disconnected EVAP hose. Other than that, I'll try and post up the EVAP info you asked for once I find it.
 

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Discussion Starter · #4 ·
I know this is very generic, but have you tried changing your gas cap? I've had these codes come up once before and it was because of a disconnected EVAP hose. Other than that, I'll try and post up the EVAP info you asked for once I find it.
Yeah, tried gas cap already. No luck.
 

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Anyone? Bueller? Bueller?

Free advice is worth what you pay for it, so if I'm wrong, no refund.

It's the vacuum switching valve on your charcoal canister. The part number for your charcoal canister is 77740-34080. I believe Toyota does in fact sell your VSV separately from the charcoal canister, it's part number 90910-12130. Over $100 at the dealer, about $50.00 on eBay.

It's the silver and blue thing.

 
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