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my car had the code of p0411 and shop says it is the secondary air injection, new it is $260 and the only used one i found was sold out from under me 30 minutes before i got there to pick it up(my husband called yesterday to get and they said they would have it removed today) they wouldnt take his name tho. it is a 2007 2.2..any ideas on a used 1 close by. nw iowa
 

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check pamsauto.com I've taken a few parts off cobalts and HHR's they have sitting around there and its in MN so shipping wouldn't be much
 

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i had this problem a couple of weeks ago,this is what happen to my car: first the pump went an when i pulled it out it was full of water so i replaced it then the diverter valve went which runs the pump. if u drove through any puddle's lately try to pull it off an drain all the water an then plug it back in an see if it works. if u know anybody that works for a dealership u can get it for half price,my father works at a GMC dealer so i paid $109 for the pump an $137 for the diverter valve. oh yah i took mine to the dealer first an they tested the pump an told me it was the pump after i replaced it the light was still on so i took it back an they tested it again an found that it was the relay that runs the pump which is part of the diverter valve. hope this helps
 

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2007 LTZ code p2440 says secondary air intake clean it or replace it $260 new and not available in auto parts stores yet. CLEAN IT its easy.
 

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Make sure your sai tube is connected properly so there is No air leak

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