Well I defintely haven't looked at those sensors yet so i'll give them some cleaning and see if that helps my startups
I actually installed a backup camera at Christmas and this problem started around the same time. I figured I wired the camera wrong, so I disconected the camera for a couple days to check if the starting problem reocurred and unfortunetly it did. Obviously I should check my wiring again if you had the exact same problem.
Thanks guys . Now I have a few new "fixes" to try out, I'll update the forum in a couple days