FROM PARKED POSITION PLACED KEY IN IGNITION AND STARTED CAR. ALL WARNING LIGHT (TRACTION CONTROL, EMERGENCY BRAKE, SERVICE STABILITY, ETC) REMAINED ILLUMINATED AND DID NOT GO OFF. ATTEMPTED TO TURN OFF CAR AND IGNITION WAS STUCK IN "ON" POSITION. COULD NOT TURN CAR OFF OR REMOVE KEY FROM IGNITION. VEHICLE HAD FULL POWER AND WAS ABLE TO GET HOME EVEN THOUGH WARNING LIGHTS ACTIVATED. ONCE HOME, HAD TO TRY NUMEROUS ATTEMPTS TO GET VEHICLE TO TURN OFF. FINALLY, HAD TO UNHOOK BATTERY, PULL FUEL PUMP RELAY, AND PULL WIRES OUT OF COMPUTER IN ORDER TO GET ENGINE TO STOP RUNNING. HAVING TO TOW TO SHOP FOR REPAIRS. POSSIBLE STEERING WHEEL CLOCK SPRING IS STUCK. IF IT IF THE CLOCK SPRING, THIS WILL BE THE SECOND TIME THAT WE HAVE HAD TO REPLACE IT. *TR