Just installed my stock ecu and have a few codes popping up. Codes are p0141, p1035 and p0155. I was going to look into replacing the primary 02 sensor(header one) to see if that corrects it. While I was looking through the engine bay, I noticed this plug loose without anythjng around to connect to. I wanted to make sure this plug wasn't causing the codes. Can someone verify with me what this is?

It doesn't look like it connects to the engine harness so I don't think this is what's causing those codes but wanted to confirm.

Thanks

 

I had the same question. I believe that one is the same one I asked about. It is for a remote tach