My transmission is shifting really jerky. I took my car to the local Nissan dealership and they said it's not an actual transmission problem. They did a diagnostic and the code that came back was for the "Fluid Temperature Sensor Circuit and A/T control unit power supply". They think the control unit is damaged, because they fixed the Overdrive about a week ago, it was blinking on and off and causing the car to kick in and out of Overdrive. Before I took it to Nissan I did the self-diagnostic procedure on it and it flashed back that code as well, but after I got it back from Nissan the diagnostic doesn't seem to work (flashes no code whatsover).
I was also wondering if the problem could be caused by some bad grounds, because I found 2 already that the undercoating paint was not scraped off. Cleaning these up seemed to fix an erratic Thermostat problem I was having.
Any suggestions would be appreciated. At least the Overdrive seems to work...
