fortitude

The hose that connects to the center of the T fitting shown in picture has come off several time while engine is running, then the check engine light comes on. The hose is in good condition and fits on the fitting snug. I have not checked the codes yet for CEL.
I am not familiar with its specific purpose, but is there a pressure issue which results in the hose coming off ?
Why does this pop off?

fortitude

I have now had the CEL code checked - P0442
I informed the mechanic about the hose coming off its fitting. He said some people put "hair spray" on the fitting then push the hose on - to keep it more secure.
He said the code is associated with the detached hose & cleared my CEL.
Good news - have driven for a day - and no CEL.
To replace this vacuum hose (apparently special tubing and comes as a set with the adjacent hoses) is over $100....
I will try the hair spray trick....

fortitude

After several days of driving the CEL P0442 returned. I went the cheaper route first and replaced the fuel cap with a new OEM fuel cap. Several days of driving - P0422 has returned

Any thoughts on what I should check next?

JSM

Nothing like answer your own posts. If you send me your email, I'll email you the portion from the FSM for that code 440 and 442. Mine is from an 01 so I don't know how different it will be than the 02.

If that hose keeps poping off I would use a small plastic zip tie. You can get them at wal-mart.

z123xie

How did you fix it?

fortitude

used tiny zip tie on vacuum line at T fitting. Also found dry, cracked vacuum hose at evap canister. Replaced it - P0442 has not returned

ES300NZ

seconding zip tie / cable tie fix. that's correct.

omar804

has anyone replace their vacuum lines? what do use, size wise for each one? is silicone material ok? mines one the 2002 ES 300 are brittle and keep falling off, and i need to replace them for good.

LeX2K

I find the OE lines the best, superior to silicone see this post
https://www.clublexus.com/forums/es-...l#post10520041

omar804

thanks bro.

omar804

anyone knows what the part is called that's connected behind air filter box, just before the MAF sensor? i was checking today on my 2002 ES300 that i just bought, its broken.

omar804

nevermind, its the 90910-12199 Canister Purge Control Solenoid, the nipple is broken, i have to order new one. i found a used OEM one and aftermarket new one, i guess im gonna get the OEM.