Gabehallrod

I am in the process of buying a 2006 Subaru Tribeca, the car run great and has been well taken care of. On the way to sign the title and make the sale, the check engine light came on flashing intermittently as well as the anti skid light, the cruise control also was flashing and neither the skid or the CC we're functioning. I had driven the car earlier and had no lights on. Car ran very smoothly. Had a couple mechanics take a look and nothing seemed to be out of order and there were not codes coming up from the scan. Mechanic said it might be a tight valve.....anyone have any advice about what this might be? Love the car but don't want to get involved with something that's gonna be more trouble than it's worth.