I ate a curb last night and cracked my LF rim I went to NY and grabbed a set of rear 18's and moved my rear 17's up front. I had to reset the TPMS system afterwards to get the system to recognize the new sensors.

 

Has your slip light come on yet? You have potentially changed the outside diameter of the tires between front and rear. Any difference in diameter among the wheels exceeding 3% will mess up the VDC system and cause problems. Check your tire specs against a tire calculator to see if you have an issue between front to back.