At a glance
What can fail
During the canister purge cycle, the evaporative emission control system can apply too much vacuum to the fuel tank, causing minor distortion and potentially a small crack on the upper tank surface. This may trigger the Check Engine light and cause a gasoline odor.
What the fix does
Dealers will pressure test the fuel tank. If cracked, the tank will be replaced.
Summarized — see the official notice for exact wording, dates, and contacts.