For the last 6 months the D for Drive flashes periodically. I've read up on the other threads related to this but my questions is this. Is it possible that they blinking D could be related to a loose connection of the battery? I noticed that one of the contacts was loose and now that I've tightened it, there hasn't been a flashing D in the last few days. I suppose if it reappears, I may have to replace one of the sensors. Any ideas?