So the last week I've been getting P0446. I have been able to clear it only for it to come back 2 days later, every time. Today I removed the canister and blew into it, only to meet 100% resistance, and was unable to blow through it, meaning the canister is still good, right? Unless it is stuck closed? Anyway, I reinstalled it and ordered the part anyhow. I tried to clear the code again only to see two codes this time! And I was unable to clear P0446 this time! Car is idling a little high, around 900-1000 mark but slowly comes down. I have pictures of my log I will attach, but any help is appreciated.

 

 

 

 

 

 

 

Little help?

 

evap purge solenoid maybe?

 

Im replacing that. But when I blew through it, it was fine.

 

Doesn't matter if u can't blow through, it may just not be opening.

 

Ok that is a tank pressure code. Not enough pressure so u have a leak somewhere. Fist check ur gas cap to make sure it's on properly. If that don't work, try replacing the tank pressure sensor on the canister , black thing under ur car back behind ur gas tank. If u changed the solenoid on the intake, thAt probably isn't ur issue.

 

I'm currently waiting on that intake solenoid to get on tomorrow. I think I'll just replace that and the gas cap for good insurance. Then look into the switch under the tank. Do have a picture?

 

Should I return that intake evap purge solenoid?

 

Replaced evap purge solenoid on manifold, and code P0446 came back 4 days later. Any ideas?? Please help....

 

try replacing the gas tank pressure sensor. and the evap vent solenoid, both are located on the evap canister behind the gas tank.

 

^this i ended up replacing both the purge solenoid and evap vent solenoid before my codes went away for good.

 

Do you have a pic of those two components?

 

I have a vent solinoid at home and possibly my old tank pressure sensor. U can look me up at rock auto.

 

Goto rockauto.com and look for this stuff

AIRTEX / WELLS Part # 2M1084 More Info {#15788844, 15795021, 17114055, 21993142, 22865590, 25321964, 25932573} - evap vent solinoid
May Require 1P1793 Jumper Harness Connector for Installation because of OEM Redesigned Vent Solenoid

I will need the connector to cause the solinoid has different plug than original, they all come like that now .

ACDELCO Part # 13502903 - fuel tank pressure sensor

 

Sweet, I'll check it out when I get home.

 

It's up here?

 

yes that's the evap canister. the vent solenoid is the one with the red plug and the tank pressure sensor is the white plug

 

Sweet! That looks easy enough. I hope that fixes my code for good. So I really need that extension cord thing?

 

Yes , the solinoid has different plug now that they updated it