Jump to content

P0446 Evap Code

ippielb

Recommended Posts

ippielb Enthusiast

ippielb

Posted
Posted

I'm needing some help finding the valve on my 2002 silverado 1500, my check engine light has come on twice in the past month for this problem. I live on a farm and i do a lot of gravel road driving, i took it into a shop to get cleaned, i paid them $70 to get it cleaned, and two weeks later engine light came back on, i took it to part source and got the codes read, said it was the same problem, the same code. They deleted the engine light, so now i can't take it back to the shop to get it fixed. So, I'm looking to do it myself. If anyone could show me a picture of the valve, so i can clean it, i used a 1/4 tank of gas driving around 100km. This needs to be done right now.

wriley4409 Enthusiast

wriley4409

Posted
Posted
I'm needing some help finding the valve on my 2002 silverado 1500, my check engine light has come on twice in the past month for this problem. I live on a farm and i do a lot of gravel road driving, i took it into a shop to get cleaned, i paid them $70 to get it cleaned, and two weeks later engine light came back on, i took it to part source and got the codes read, said it was the same problem, the same code. They deleted the engine light, so now i can't take it back to the shop to get it fixed. So, I'm looking to do it myself. If anyone could show me a picture of the valve, so i can clean it, i used a 1/4 tank of gas driving around 100km. This needs to be done right now.

 

 

 

 

I don't have a picture of it, but it sits right on top of the fuel tank. (a terrible location - which is the real problem) There is an updated part that relocates the sensor to the top of the bellhousing/transmission.

 

Good Luck!

 

Wayne

ippielb Enthusiast

ippielb

Posted
  • Author
Posted

I just spent 40 minutes looking under my truck, and I've been unable to find this damn valve! Can someone please! Please! show me where this valve is! I'm so sick of this.

 

Edit:

Please, if anyone wants, i got a free 1 month card for Xbox live for the first person who gives me a picture that helps me find and clean the valve!

04CCSO Enthusiast

04CCSO

Posted
Posted

Mine is on the back end of the tank (04) some were on the front some were on top. Look between the cab and the box if it is in the front of the tank you should see it through there. If not find the charcoal canister and trace it back.

04CCSO Enthusiast

04CCSO

Posted
Posted

#2 is the vent valve and the square box next to the tank is the charcoal canister. There should be hard lines running out of it. not sure if the box is in the same place on the 02 either.

ippielb Enthusiast

ippielb

Posted
  • Author
Posted

Okay, i found the EVAP valve, but i cannot get the line disconnected from the valve. I found a picture of what mine looks like, it's in the most absolute retarded spot any engineer can think of. i really want to slap the person who put that damn valve there.

evap_canister.gif

 

How does one disconnect the line? I've tried everything.

ippielb Enthusiast

ippielb

Posted
  • Author
Posted

Well, managed to do it. After basically getting angry and ripping that damn line off the valve and the box. I cleaned it out that's for sure, sat there for a half hour, blowing that damn thing out with the air compressor. It was REALLY dirty in there.

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Recently Browsing   0 members

    • No registered users viewing this page.

  • Forum Statistics

    250.4k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    342,840
    Total Members
    8,960
    Most Online
    appletrav
    Newest Member
    appletrav
    Joined

  • Who's Online   1 Member, 0 Anonymous, 434 Guests (See full list)

  • Latest Articles

  • Posts

    • newdude
      2 speed transfer case optional now?

      By newdude · Posted

      This is a 1/2 ton thing ONLY.  All HDs 2020-2026 have the two speed transfer case, with Autotrac as an option.     1/2 tons 2019-2026, regular 4x4s come with a single speed case (no 4LO!), and trucks with Z71 ordered, or all Trail Boss trucks come with the 2 speed case.  2 speed case is also an option on WT, and is also standard on High Country.  
    • newdude
      Different requirements for oil filters?

      By newdude · Posted

      2013 5.3 still to this day calls for the PF48 filter.  Which as a 15psi bypass pressure.     There is a TSB, 17-NA-157 that talks about the PF-63 and PF-64 filters which have a higher bypass rating of 22psi.    TSB HERE - temp.xml   "Beginning in 2012, the oil pumps began to regulate main gallery feedback instead of pump out pressure. This means that the oil pump now does not begin to regulate until pressure is built up to the main gallery. This change reduces the amount of time it takes to provide oil to the engine bearing and lifters during extreme cold start conditions.  Main gallery feedback oil pump control systems are present on the following engine families which use Spin-on oil filters: Small Gas Engine (SGE), Large Gas Engine (LGE), High Feature (HFV6) Gen2 and Small Block Gen5 gasoline engines. These engines with the main gallery feedback oil pump control systems are factory built with an ACDelco® oil filters"   It also calls out what engines use those filters.  The gen 4 small blocks were not on that list (LMG, LC9, L9H, L92, L94, L20, L96).  Gen 5 small blocks use the higher pressure filter.          That all said...   Your 7045 Napa filter is the PF63 equivalent, with 22psi bypass.  You are already using the higher bypass pressure filter.  You CAN keep using it, you don't technically have to use it though.  
    • Grumpy Bear
      Different requirements for oil filters?

      By Grumpy Bear · Posted

      Do you know WHY the filter relief setting was increased to 22 psig?    When the new system goes into the second stage the pump volume ramps up considerably. It was found that the 15 psi filter bypass setting put the filter in bypass on a warm engine when the second stage was activated. Raising the filter bypass setting forced the filter to do what it designed to do. Filter. Preventing debris from circulating during high load, high rpm operation.    So next question is how did GM find this out? VLOM/lifter failures and a deep dive by Melling Corp.    Last question. Is it required? Look at it like this; a motor may be equipped with a rev limiter. But it only works if the set point in reached. That 22 psig setting only matters if the pressure differential across the filter media exceeds 15 psig during normal warm operation. Second stage kicks in around 3000-3500 rpm.    I can't answer your question because I don't know you and how you use the truck. But I think there is enough information here to let you decide for yourself. 😉
    • Coastie05
      give me some tips to make my truck look better

      By Coastie05 · Posted

      Go back to OEM wheels. 
    • newdude
      2020 Trailboss 6.2 replacement

      By newdude · Posted

      Probably not their first rodeo, so it should go as planned most likely.  Typically the service manager or tech doing the swap will put some seat time to shake it down after they get it all put back together.  We usually put 50-100mi before we hand them back so if something happens, its not after you get it.  A coolant leaks, oil leaks, a ground left off or loose, vibration, etc.     The new engines so far have been good?  There's been a couple that have popped out there again (the replacement engine) but most have been okay.  

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...