ok i just put a new exhaust on my 97 d16y7. i made the dumbass mistake of unplugging both o2 sensor and not labling which one is primary and which is secondary on the engine harness. both plugs have different color wires on the engine harness. so what i need to know is which is primary and which is secondary. (im an idiot sometimes lol)

 

Primary is the 2 black,green,white and you know the other is secondary.

 

I would think it matters but I've heard it doesn't. I'll check the manual, hold on.

 

i know, im not talking about the actual sensor. i mean the plugs one the engine harness. which is primary and which is secondary?

 

engine harness= primary o2=blk/wht,blk or blk/yel,wht,grn/blk secondary o2= blk/wht,blk/yel,red/yel,wht/red