Question about Chevrolet Cobalt
Code P0446 is related to your vehicles evaporative emissions system. Often this is caused by your gas cap not being properly tightened.
Before running out and spending money on this issue be sure the gas cap is in good condition and make sure it's tight. (At least 2 or 3 turns after it begins to click)
Drive the car for a few days. If the check engine light doesn't turn off you will need to go to a repair shop who can scan and troubleshoot the problem.
Posted on Jan 30, 2010
the code you got, p0446 is an evaporative emission fault. Often this code is tripped by a loose gas cap.
If this is the first time you got this code, have it cleared, make sure your gas cap is fitting snug, after it is clicked on, and drive the car normally and see if it comes back. If it comes back, you need to continue your troubleshooting of the emission control system.
Posted on Jan 30, 2010
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Posted on Jan 02, 2017
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Sep 01, 2015 | Cars & Trucks
Oct 19, 2014 | 2007 Ford Explorer Sport Trac
As the title says: some might have an ses p0446, evap emissions vent circuit low. If you take it to the dealer they want 300-400.00 to fix the problem. GM has a service bulletin on this condition and have the updated part for 180.00, thats suppose to eliminate this issue.
Basically the problem is, the evap purge vent valve gets clogged with dirt, especially if the truck is used in dirty conditions. Well I figured there had to be a cheaper way to cure this problem.
Here it is:
1) find the location of the vent valve; its under the truck, locate the charcoal canister on the front of the gas tank and trace the vent line to the vent valve.
2) Take the bracket loose with a 5/8 wrench.
3) Spin the valve around so the side with the hole is facing you.
4) Take an air compressor and blow the vent valve out.
5) reinstall and clear the code and it's fixed.
Now I know the updated part from gm is supposed to keep the valve from clogging ever again, but why spend the money when all you have to do is blow out the vent valve every 50k-100kmi and save your $$$!
Jul 18, 2014 | 2006 Chevrolet Uplander
Mar 25, 2014 | 2006 Kia Rio
Dec 04, 2012 | Cars & Trucks
A code P0446 could mean one or more of the following has happened:
May 21, 2012 | Chevrolet Impala Cars & Trucks
Feb 06, 2010 | 2004 Chevrolet Avalanche
Nov 17, 2009 | 2002 Toyota Corolla
Jul 27, 2009 | 2005 Chevrolet Cobalt
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