2007 cobalt 2dr 4cyl manual.
So last year I get p0411 and several other codes. I replaced the air pump and check valve, cleared the code and it was good. So it comes back recently, I replace the air pump and check valve again, still throwing codes. I read that the relay will blow if the pump is locked up. So I put in a new relay and clear the codes. CEL stays off for like two weeks. Was ready to get it inspected was waiting for secondary air monitor to go. Then CEL comes on. P0411 again! EVAP monitor incomplete now but secondary air monitor completed. I'm at a loss here. Any help or suggestions would be greatly appreciated. Thanks guys.
~Patrick
