My CEL light came on last night and when I went to Autozone to have the code checked, they couldn't get their machine to read. The guy said my OBDII plug is not connected to the computer or unhooked somehow. So I took it across the street to Advanced Auto and they plugged in their reader and it kept saying to plug it in. He said the same thing, "diagnostic plug is not connected to the computer." So I'm guessing I have to trace wires and find what's not plugged in. With an engine swap done recently, I'm guessing a plug was overlooked.
I'm not even sure where to start looking. I glanced under the dash, but didn't' see anything unplugged.
I did notice both of these while looking for things unplugged under the hood. What are they?
This I'm not sure what it is, but it has a "star" on one end and threaded above and below the nut on it.
I'm guessing it goes in the hole pictured below perhaps?
What goes here? (passenger side back of engine/front of tranny.)
Maybe the bolt from above?