P0442 Code

[bmmarcom]

I have a 2002 I bought from a friend. Very strong and runs perfect, but throws the dreaded P00442 or P0440 code often. She had the canister replaced with a used one unfortunately. Strange thing is when I start it, if I will put it in gear and back out of drive or go just a few feet, then back to park, kill it, re-start, it will not throw code all day....could the code be from the check valve on gas tank or is it just another bad canister? ....any advice greatly appreciated.

 

[Yepezdispenser]

Here's a thread with lots of good info, you may have already seen it. http://www.toyota-4runner.org/3rd-gen-t4rs/180062-p0442-w-fuel-smell-rear-4runner.html

Although if the charcoal canister has been replaced I would try either the check valve or the gas cap, both are pretty inexpensive. Strange that it would go away with that combination of maneuvers.