At a glance
What can fail
The fuel pressure sensor on the engine fuel delivery pipe was not tightened enough at the factory. Over time, it can loosen, allowing fuel to leak through the gasket and threaded connection.
What the fix does
Dealers will check for fuel leaks from the sensor. If no leak is found, they'll tighten the sensor properly. If a leak is found, they'll replace the gasket and tighten the sensor.
Summarized — see the official notice for exact wording, dates, and contacts.