were is p0418 it located on 2005 cadillac deville

Question

need to find location on car of code p0418 so can fix

Answer 1

P0418 Secondary air injection (AIR) pump control circuit

There is a variety of cause for this code to set, It set when the ECM see a low voltage to the AIR pump relay control circuit. Check the fuse should be listed as AIR pump fuse and check the IGN 1 fuse replace if open, You also have 2 relay that should be looked into or replaced listed as AIR pump relay coil and AIR pump relay control. either one of these relay would set a P0418,