Bruce Nunnally Posted February 8, 2014 Report Share Posted February 8, 2014 I have a 2007 Cadillac Dts that Check Engine Light came on. The code is P0411.What does that mean, and approximately how much to fix it? Dealership, or can I do it myself? Bruce 2023 Cadillac CT4-V Blackwing Follow me on: Twitter Instagram Youtube Link to comment Share on other sites More sharing options...
Cadillac Jim Posted February 8, 2014 Report Share Posted February 8, 2014 P0411 Secondary Air Injection (AIR) System Incorrect Flow Detected Either the AIR pump or the AIR solenoid (or relay) is not switching on or off on command of the PCM. look for wiring problems first, then check the AIR pump, the AIR solenoid and the AIR relay. -- Click Here for CaddyInfo page on "How To" Read Your OBD Codes-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data -- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC Yes, I was Jims_97_ETC before I changed cars. Link to comment Share on other sites More sharing options...
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