I haven't had an issue with my 04 G35 coupe until two days ago. I drove over a low profile train track (just like I do every day) but something felt off. And at that same moment, the VDC OFF & SLIP lights turned on. They stay on until the car is restarted. It also feels like I have slightly less power when they are on as well.

Any ideas why this is happening??
My breaks are good & tires don't needs to be changed.

All advice it appreciated (:

 

You more then likely have a p0340 code (or something like that) for a camshaft positioning sensor. Go get your codes checked at the nearest auto parts store or buy a obd2 checker if your state doesn't allow that.