The other day my maxima had the ses light came on. So I took the car to autozone and they were unable to scan the car. The scanner said it wasn't connected to the car. So I took it to a few other places with the same results. Any idea why the obd port isn't working?

 

Believe the OBD port requires 12V so maybe a fuse is blown. Which one it is I can't tell you. It could be fused with another piece of equipment, so look around for some other electrical device that is not working.