PO441

My 2002 Tundra V-8 has a check engine light on and a PO441 code. A vacumn hose from the switching valve to the charcoal cannister occasionally disconnects from the switching valve. This is the hose that has the test port.

Any thoughts on this would be appreciated.

Ken

 

I would just do the obvious thing and replace the worn out hose and see if it happens again.

 

I agree with Bill. Trim the latter 1/2" off the hose. Reattach. Consider a simple clamp, or even a zip-tie.

Of course, P0441 can also be caused by a faulty gas cap, or not tightening the cap down to 1-2 clicks. But given the hose is off ...

 

Jack and Shifty,
I replaced the hose that kept coming off the switching valve and have driven 300 miles with no problems. The old hose was cracked and hard at the end.
I appreciate your help.
Thank you,
Ken

 

Thanks for posting solution OP. Rock on.

 

If one is old and cracked, they're probably all old and cracked. @Tundra2 and myself have both used this kit:

https://www.siliconeintakes.com/liq...-p-590.html?osCsid=rg0u55u4augs3dbomvennu4eb1

It comes with replacement hose for almost everything in the engine bay.