Had the same thing throttle positioning sensor is getting ready to go out. Soon it will likely start cutting out on you, then it will leave you stranded then it will give them a bad coed for your TPS. Pretty inexpensive.
If you have absolutely no power tis you wireless ignition node (key switch) I tried new everything and nothing worked. Towed it to the dealer last week and its still there. the part is restricted and on back order.