Dreaded p0449 code

[Aaronradd]

I got this code and I changed the evap vent solenoid that's above the spare tire. The gas cap looks fine. Not sure what else to do. Any help would be appreciated. It's a 08 Tahoe with a the 5.3.

 

[Doubeleive]

there is another solenoid on the intake they run about $35.00 usually if it's not the rear one then it's the front one so most people just shotgun it and do both and usually the canister as well, but if pellets didn't come out of then your probably good.

 

[Aaronradd]

What's the one on the intake called?

 

[Kraig]

Purge solenoid

 

[donjetman]

Gas cap – ACDelco GT330

Vapor cannister purge valve on intake – ACDelco# 214-1680

 

[Big Mama]

You’d be surprised about the gas cap it may look ok but at 11 years old it’s cheap insurance.

 

[Aaronradd]

I took out the solenoid on the intake it was clean and works fine. I tested it using a couple wires off the battery and had my son blow through it and it seems to be working fine. Both solenoids are working so does that mean the charcoal box is bad?

 

[HiHoeSilver]

I took out the solenoid on the intake it was clean and works fine. I tested it using a couple wires off the battery and had my son blow through it and it seems to be working fine. Both solenoids are working so does that mean the charcoal box is bad?

Take it off and shake it. If it rattles, it's done. If that's the case, you should also remove and blow out all the lines down there. Those loose pellets from the canister clog them up.

 

[igell]

dont just replace parts fo the hell of it.. take it to a shop and have them tell you the exact problem. I replaced both solenoids and the charcoal canister. i still get the code

 

[aba87]

I’d check all the evap lines for any signs of charcoal. The charcoal canister on my 2005 Tahoe came apart internally and sent charcoal pellets throughout the system. The pellets were in the line going to the tank and all the way up to the purge valve. There is a connection on the drivers side where the plastic line switches to metal over the transmission. That connection must be disconnected on order to blow all the charcoal out of the lines. The way the metal tube is cut acts like a check valve when trying to blow air either way thru the line.

 

[Doubeleive]

dont just replace parts fo the hell of it.. take it to a shop and have them tell you the exact problem. I replaced both solenoids and the charcoal canister. i still get the code

actually it can be the same or less cost to just replace the solenoids and canister -vs- leaving at a shop and being without a car paying for a cab or uber and waiting for them to get to it and then ream you for the diagnostic and overpriced part & labor just to have the other part fail shortly after the first one was replaced, you can get all the new oem parts for just under $200 and do it yourself in about 30-45 minutes and be done with it for another 10 years..

 

[Doubeleive]

if you still get the code after replacing the parts then the line is clogged or cracked or a part you installed is defective

 

[SPDMETL]

We got the smoke test at the stealership twice, replaced solenoids, still have report-to-dealership light on...I can't stress enough how little I care about the evaporative emissions system! We only got it worked on because check engine light=no remote start...******* know exactly how to make you come in and keep downloading money. $600 later, light's still on and no remote start.

Next step-get HP tuners and disable all that funky shit!

 

[Big Mama]

Dealer doesn’t back up their work? Get your $600 back and go somewhere else. Sorry you’re dealing with that.