2011 Subaru Limited 2.5i Outback with 41,000 miles. The car would, when driving, start missing terribly, then die. After sitting for a while, the car would finally start again, drive a ways, start missing terribly, then die. First time this happened, my mobile mechanic put his computer on and it threw a code for a bad cam sensor. That was replaced. Car seemed to run ok for a week, then the problem showed up again. Since this car is driven so little (to work and back every day for a total of about 6-8 miles per day), and since it seems the problem was occurring only after the car warms up, it took a drive of over 6.8 mile to have the problem occur again.

I cannot say for sure that the problem would not have continued occurring even right after the cam sensor was replaced. As of now, I don't believe the cam sensor was the problem. Then, the exact same original symptoms of missing terribly, then dying, have occurred again. Dealer service department said it was the valve gaskets/plug gaskets leaking oil onto the spark plugs. They replaced the gaskets and the plugs to the tune of $950. And now, AGAIN, the same symptoms occurred on 2/21/20. Now the same Subaru dealer service department says the problem is the ECM to the tune of $1,000 for the fix. I'm afraid this is one of those problem that will never go away. I do not trust the Dealer service department to diagnose and fix this problem correctly ever.