headlight relay ??'s and fuel sys ?s

sup fellas… well i have a couple problems right now… the first one which is minor is when i shut my car off and let it chill my head light relay or possibly something else clicks like crazy… with the car off and no power… it sounds like someone is playing plinko inside there… does it need to be grounded ??? doesnt look like it but i dunno prolly just get a new one here is what it looks like, its the piece by the crossmember …

also my car is throwing code 43 … so i replace the o2 with one from the parts store and wired it direct to the euc… worked good for about a week but now its back and throwing it again… i did all the obvious things like check the connections and is all good i think its just a shitty ching chang meow universal sensor that blows… so hopefully a new oem will fix it and its not the pump.

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