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I keep getting a po411 fault code showing up,has to do with cold start air intake,I have a K&N filter,and it started doing it after last filter cleaning,08 Cobalt, any ideas?
 

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Wootsauce!
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That code is something to do with the SAI (secondary air injection)

Maybe a fuse or relay for the SAI or you sucked water up into the SAI tube.

ECM
-P0411 - Means youre secondary isnt flowing enough, could be stuff in the tubes, air pump inop(blown fuse or water in pump are common)
 

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po411

pump is working,I can hear it again on a cold start,however light tripped again,took the relay out,that triggered a different code for faulty relay,put relay back in,pump works on cold start,po411 tripped again,I took the entire solenoid off,took it apart,it had water in it,cleaned all carbon build up off with carb cleaner,sprayed plunger good with motor-kote,let it soak for a while,re-assembled,and no light on cold start,and pump is still working fine,so hopefully problem is solved,will know for sure over the next day or so,if it comes back,I feel like the problem lies in the solenoid.......agree?,,thanks for the accurate advice

Dan
 
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