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need to find location on car of code p0418 so can fix
Vehicle: 2005 cadillac deviile v8 Chevrolet please help me find location

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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,

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