On my dash board I get a code saying "theft system problem car may not restart

Hello it seems to me that you are having a problem with the v.a.t.s. {vehicle anti-theft system}this may be the chip in the ignition key losing the correct resist.to match the anti-theft control module or the ignition key lock cylinder and wire connection is failing and soon the vehicle may not crank at all.I recommend to address this asap with a locksmith or see the dealer.