Hey guys, I have a check engine light on my 2002 Nissan Xterra and went to get it checked out. Upon doing so, we found out that the OBD sensor link doesn't work. Also noticed that on the right side of the ECU there is a gray connector not connected.


Any tips to fix the OBD link would be much appreciated, and whatever that gray wire is if anyone knows if that is important let me know.

The connectors to the CPU are pretty tight...but, nothing should be dangling...so, did you try to re-connect it?