[2k4 Tacoma]

So on occasion, which seems to be on warm or hot days, the CEL pops on and I get these codes:
P0446
P0442
P0441

So there's an issue with the evap/vac lines some where... Again, Not messing around I plan on changing/replacing all those rubber hoses on the driver's side behind the battery & fuse/relay box.
Anyway, I can't see to find the parts schematic with all the part numbers so I can order all these components.
I tried doing a simple search on RockAuto & AutoZone... can't seem to find any shaped/formed hoses.

Yes, I tried searching... all I found was empty comments and no part numbers... NO I don't want generic stuff... I want the preformed/shaped hoses and that box-module "thingy" too.

Since this line is dry-rotted, I'm thinking it's the one causing me these codes [P0446/P0442/P0441].
Two pics directly below... different views... Plus, Happy Father's Day everyone!

What about these lines and that "block" looking thing... Part Numbers?

Same lines just different view ... Part Numbers?

 

[Enola Gaia]

I can't identify those hoses against any 2001- 2004 part numbers. I can find lists of what may be EVAP hose part numbers, but no description or diagram that allows me to match parts against your pictures. The FSM is no help in identifying individual hose or vacuum valves.

In the mean time, here (attached) are the 2003 (same gen) 2RZ diagnostic chapters for the codes you listed. My guess is that it's the old hoses, but notice that these codes could be thrown in response to other malfunctioning components - extending all the way back to the fuel tank area.

 

[2k4 Tacoma]

But I replaced the evap-canister over the fuel tank back in 2018 with a Dorman version.
-
P0441 doc:
I have replaced the "purge-valve" with an OE one back in 19/20... see page DI-157 step-6 "Check Purge Valve"
Page DI-158, "Check VSV for CCV"... I was trying to find the part number for "VSV" part. What does these abbreviations stand for? I didn't see any description...
-
I figured I'd start with the dry-rotted hose but since I gotta mess with those other hoses... just do the job "up-front" one time.
Really don't want to deal with that canister again... =)
That Dorman canister was still pricy and the OE one was another $100 more.
-
Plus, I had to go back to the OE gas cap since the "key-lock" cap some how created tank pressure... always had a "hissing" sound when I start opening this cap to fuel-up... so I had to slowing release this residue pressure before simply "pulling/twisting-off" the locking cap.

 

[2k4 Tacoma]

My Tacoma gets TLC just like my "Toys"... She still "sparkles" after all these years & for being my "winter-beater"!

 

[Enola Gaia]

VSV = "vacuum sensing valve"
CCV = "canister closed valve"

 

[2k4 Tacoma]

I did another search this morning & stumbled in this:

VACUUM PIPING. Tercel | Toyota

Tercel VACUUM PIPING

parts.toyota.com

2003 Toyota Tacoma 2.4L M/T 2WD Parts like evap

2003 Toyota Tacoma 2.4L M/T 2WD Parts like evap. Our catalog includes 26482 Products in 63 categories.

parts.toyota.com

But I can't seem to relate this schematic to my truck [via my truck pics].

I clicked "2.4L 2wd" but the pic/schematic looks like the v6 version versus the 4cyl one...

What do you think?

Plus I couldn't find a phone # to call a reputable dealer that would help us forum members here... any suggestions?
I'm thinking I may have to call a parts department dealer to get help...

 

[Enola Gaia]

I think you may be right about having to give up and consult with a dealership parts department. Certain minor items like hoses were often left unspecified in the factory parts diagrams or parts listings. Hoses, brackets and fasteners are 3 categories of items for which no one seemed to think details were needed.

 

[jnana]

Does this help???

Vacuum Hose- Toyota 2.7L 3RZFE 4Runner Vacuum Hose Kit (1996-2001) Kit-1113