2000 Jeep Wrangler COMPUTER CODE

WHILE IM DRIVING THE AIRBAG LIGHT COMES ON AND THE SPEEDOMETER AND TACH DOESN'T WORK THEN THE ENGINE LIGHT COMES ON AFTER A COUPLE MINUTES IT ALL COMES BACK TO NORMAL LIKE NOTHING HAPPENS. IT HAS DONE THIS THREE TIMES IN THE LAST WEEK. THE SPEEDOMETER LED READS "no buS" WHILE IT HAPPENS. THANKS IN ADVANCE