I got a 99 Civic Si, and i'm hooking up my air/fuel ratio gauge. I cannot find a diagram anywhere for this ecu, and i need to find the o2 sensor wire. All i found is that its pin C16, but i dont even know what that means. Can anyone help me out?

 

If I remember correctly its either C1 or C16 and its a white wire. My memory tells me that its the C16 wire. If its not white then its the C1 wire...

 

yup, if i remember correctly its a white wire, it kinda sticks out its a little bit thicker than the rest of em.

 

yeah just hook it up to the white wire comming from your o2 sensor

 

Alright i got it. Thanks alot guys.