Alright I have a Cadillac Seville sts throwing trouble code for secondary air malfunction...is it hoses?
Hey Jerome! If you are getting secondary air injection incorrect flow> air injection valve could be defective. I had the same problem on 4.6L engine and could not get rid of the po411 code. i replaced everything on the evap system and still kept getting the code. I ran seafoam through the system and the code instantly went away. run it through the throttle plate. let me know if it works. good luck
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