At a glance
What can fail
The crankshaft position sensor on certain 8.1L engines may fail intermittently or permanently. If it fails partially, the engine runs rough, the Service Engine Soon light comes on, and the engine may stall and restart. If it fails completely, the engine stops and won't restart.
What the fix does
The dealer will replace the crankshaft position sensor with a new one.
Summarized — see the official notice for exact wording, dates, and contacts.