Check Engine Sign

[tadin]

I had check engine sign on and checked at autozone. Also dropped by the autobody shop and they said it's emission system and replaced my canister. But after i drove 500 miles it came back, spend about 680 including parts and labor. Not really happy. What could be a probable cause?

[lexus114]

I had check engine sign on and checked at autozone. Also dropped by the autobody shop and they said it's emission system and replaced my canister. But after i drove 500 miles it came back, spend about 680 including parts and labor. Not really happy. What could be a probable cause?

http://www.google.com/url?sa=t&source=...qvYEBg3I9TZlcxw

And another possability > (quoted from RonsRX) Double check the hose that comes off the airbox. It can appear to be connected to the airbox, but is really disconnected from the tube that runs to the rear of the vehicle.