The race had already been halted for just over one hour and 40 minutes while a hole in the track was filled and repaired. It resumed with 78 laps to go, but the area around the repair has begun to break up again, leading to a second stoppage on lap 161.
NASCAR officials are optimistic that this problem can also be repaired and the race restarted for its final 39 laps.
Kevin Harvick is the current race leader, having been battling side by side for first place with Juan Pablo Montoya when the yellow came out for the track issue.
Primera Division round-upLeader Harvick wants race to resume
