2002 RX300 141,000 miles
Had the code read at Autozone.
Replaced the gas cap, code came back.
Any other likely causes besides a disconnected hose. Unless a hose is cracked or came off by itself I don't think its a hose. I do need to do a thorough check though.
Thanks for any tips.

Alex

 

It may also be your charcoal canister is bad,(by the gas tank underneath the vehicle)

 

P0440

Vapor Pressure Sensor
Fuel tank cap incorrectly installed
Fuel tank cap cracked or damaged
Vacuum hose, cracked, hole, blocked damaged or disconnected
Hose or tube cracked, hole, damaged or loose seal
Fuel tank cracked, hole or damaged
Charcoal canister, cracked, hole or damaged.

 

I thought about a bad canister.
Anyone know of a way to check it before replacing?

 

Well,I think their might be some sort of smoke test,or something that can be done.

 

Did your RX end up needing a canister? How hard was it to change please? Cost?

Thanks, Mike