PO446 Code

[dye4metal]

alright so my 02 tahoe 5.3 flex is throwing a P0446 code and i was wondering what i need to order to fix the problem. i have replaced the intake manifold gasket(different code) and the vent solenoid on the intake. i thought the solenoid would fix the code but didnt. i think its the vent valve in the tank. either way ill be buying a new gas cap cause of the tether. chevy said the cap wasnt bad tho

 

[dye4metal]

nothing??

 

[dye4metal]

wow

 

[YAYSTA]

i think its the vent valve in the tank. either way ill be buying a new gas cap cause of the tether. chevy said the cap wasnt bad tho

P0466 Evaporative Emission Control System Vent Control Circuit Malfunction

yea i would say most likely the vent valve, might be blocked

im new here but i notice not many people here are diy mechanic's more of a custom mod forum not a bad thing though

 

[tspain]

If you drive in a dusty/dirty enviroment, the EVAP canister vent valve can become blocked with dirt and crud.

There is a TSB out for it. #04-06-04-055A. Check the vent valve and make sure it's not plugged up. If it is, you'll need a new valve P/N 10382105
and a new bracet for the valve, P/N 15105605.

I can't be for sure if this is your problem, but it won't hurt to check anyway.

The vent valve is on the side of the gas tank in the back. It has a little red/blue 2-way connector on it.

 

[dye4metal]

alright thanx, i think im gonna order the new vent valve. btw where exactly is the canister located?

 

[tspain]

It should be on the rear of the gas tank closer to the driveshaft. I'll double check to be sure.....

 

[dye4metal]

the canister is where? btw im going to order the vent too soon and was wondering who i should order from. i looked on rock auto but im pretty sure they dont have the valve.

 

[tspain]

It's not on the gas tank, sorry about that. It's number 1 on the picture above. I'm not 100% sure but according to the pic, that should be on of the crossmembers toward the rear of the truck. Maybe right in front of the gas tank?

I'll check a vehicle tomorrow on the rack at work and let you know for sure. I'll try and get a pic also.