2000 Camry six with P0446 code

It may help others to know that I tracked down the source of the problem to
the Vacuum Switching Valve for the Pressure Sensor mounted on the canister.
It was stuck open. I took it apart and found the little piston had rust on
it. (had to force it out with compressed air). I sanded the rust, put it
back together and it works fine. This is located just behind the gas tank
in a awful location to access (not one of Toyota's better ideas). It has to
be a vulnerable part, and a likely suspect when the P0446 code appears. The
good news is that they can be taken apart and cleaned saving $.

My Camry now has 163,000 miles on the clock, and this is the first problem
I've had. What a car!

Fred

"Fred Buchholz" wrote in


It may help others to know that I tracked down the source of the
problem to the Vacuum Switching Valve for the Pressure Sensor
mounted on the canister. It was stuck open. I took it apart and
found the little piston had rust on it. (had to force it out with
compressed air). I sanded the rust, put it back together and it
works fine.
This is located just behind the gas tank in a awful location to
access (not one of Toyota's better ideas). It has to be a
vulnerable part, and a likely suspect when the P0446 code appears.
The good news is that they can be taken apart and cleaned saving $.
My Camry now has 163,000 miles on the clock, and this is the first
problem I've had. What a car!
Fred



Thanks for posting your fix. Wish more people did. Had this problem
myself several years ago & luckily was still under warranty but
wouldn't be surprised to see it surface again. Once again, thanks.
dc