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Evap Vent Valve Solenoid

kschein@aarcorp.com

By [email protected]
in Ask A GM Technician

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Grumpy Tooch Enthusiast

Grumpy Tooch

Posted
Posted

P0420 is related to your catalytic converters. It could be a faulty O2 sensor(s) or a bad cat. Or it can be caused in some cases by poor quality fuels. I had problems with one of my vehicles getting P0420, but it cleared up after only running fuel from a top tier fuel outlet. Another words stay away from cheap crappy fuels for starters. It's not the octane, it's the quality of the fuel

 

 

The P0455 indicates you have a large evap leak in your system. It could be a loose or faulty gas cap or you may have a leak elsewhere.

 

Look this thread over to understand more.

 

http://www.gm-trucks.com/forums/topic/104569-the-evap-system/

This was very informative thanks. I do have problem filling, it always clicks off if gun is in straight. I have to cock if off to the side or pull it out a little to have it fill right. VERY annoying.

 

Also, I have gotten a warning: "Tighten Gas Cap" when it was on

  • 1 month later...
  • Replies 38
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th1983 New Member

th1983

Posted
Posted

i need help finding where the Canister Vent Valve Solenoid is locate at on 2003 chevrolet silverado 5.3L any information will help me

  • 2 months later...
txab Senior Enthusiast

txab

Posted
Posted

Can anyone tell me the exact part number I need for an 05 Chevy Tahoe 4.8 for the error code P0449. Or the part number for the Evap Vent Valve Solenoid?

 

Is it ACDelco 214-2149 or 214-1105?

  • 3 years later...
SRC New Member

SRC

Posted
Posted

Hi There Everyone!

 

Well I just joined this sight and already I see  some BS floating around on it.  So we'll see if there really is any helpful advice besides the smartass that talked about throwing parts at our trucks.  I've save tons of money doing just that considering the ridiculous amount of money charged by shops mostly take advantage of their customers rather than help them, and I know all the angles as well.  Don't let anybody con you in to thinking the shop is the better option if you are capable of doing the work on your own.  I've paid for an entire transmission when it was simply the ECM.  Replaced battery, starter and ECM when it was just the negative cable to the firewall.  So with that being said, let's see what these threads produce.  I have the same problem and am interested in knowing if the common issue is the purge solenoid or the vent solenoid so I can DO THE WORK MYSELF.  Anyone?

diyer2 Senior Enthusiast

diyer2

Posted
Posted

SRC

You're first post and you're calling people out. Wrong way to ask for help.

Check this out

 

 

tbarn Senior Enthusiast

tbarn

Posted
Posted

Looking through this thread I'm amazed. P0449 is an electrical issue.  ECM, wiring or vent solenoid! NEVER a purge solenoid, canister, leak or plugged anything. Pretty good video though.

  • 2 years later...
Slowcooker New Member

Slowcooker

Posted
Posted

Really disgusted with Capital Chevrolet in Austin TX. $150 to pull the code. Third time replacing vent valve at 70k miles. 2010 Silverado 

They are charging me for 2.5 hrs of labor to replace part and new harness. $540.00 Wtf. Will definitely do it myself next time.

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