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P0449 Question?

mbecke2

By mbecke2
in Ask A GM Technician

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mbecke2 Enthusiast

mbecke2

Posted
Posted

Just bought a used 2006 gmc sierra crew cab with the 5.3L v8. The truck has 70,000 miles and is in good shape. Recently I was driving and the dash computer said tighten fuel cap. Then couple days later a got the check engine light. Got the code read and it was p0455. The check engine light went off and came back on a couple times. Now it wont go off.I took itto another store and got the code read and it was p0449. So i did some research and apparently it is a common problem. Finally today I got under the truck and pullede off what I think is the vent solenoid valve. It had a wire harness with two prongs and it was clipped onto a bracket. It had a hose connected which appeared to be shrink wrapped and the other end was connected to the cannister. I removed this part and dust and dirt was coming out every orifice, So I took the cap off and there was a round filter inside.I cleaned it out good and blew out all the dirt. I put everything back and started the truck and still got the check engine light. So I took off the positive terminal on the battery for a couple minutes and put it back on and started and still got the check engine. Is there a WAY to clear the code without buyin a scantool?? Will this work or do i need to replace the entire valve solenoid?Also I want to change the oil and I was woindering what brand of oil to use and if I should switch to synthetic?? Thanks for any replies.

bossier62guy Senior Enthusiast

bossier62guy

Posted
Posted
Just bought a used 2006 gmc sierra crew cab with the 5.3L v8. The truck has 70,000 miles and is in good shape. Recently I was driving and the dash computer said tighten fuel cap. Then couple days later a got the check engine light. Got the code read and it was p0455. The check engine light went off and came back on a couple times. Now it wont go off.I took itto another store and got the code read and it was p0449. So i did some research and apparently it is a common problem. Finally today I got under the truck and pullede off what I think is the vent solenoid valve. It had a wire harness with two prongs and it was clipped onto a bracket. It had a hose connected which appeared to be shrink wrapped and the other end was connected to the cannister. I removed this part and dust and dirt was coming out every orifice, So I took the cap off and there was a round filter inside.I cleaned it out good and blew out all the dirt. I put everything back and started the truck and still got the check engine light. So I took off the positive terminal on the battery for a couple minutes and put it back on and started and still got the check engine. Is there a WAY to clear the code without buyin a scantool?? Will this work or do i need to replace the entire valve solenoid?Also I want to change the oil and I was woindering what brand of oil to use and if I should switch to synthetic?? Thanks for any replies.

 

Go back to the auto parts store and ask them to clear the code for you. As far as the P0449 is concerned there is a wealth of information on this site concerning that issue. Try doing a search in the fullsize area and you should get your questions answered thoroughly. Oil....it's really your choice....you'll get a wide variation of opinions concerning that subject.

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