July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Special Tools Required

Vacuum/pressure gauge, 0 | 4 in.Hg 07JAZ-001000B
Vacuum pump/gauge, 0 | 30 in.Hg, Snap-on YA4000A or equivalent, commercially available

When the fuel cap warning message does not go off after fuel cap tightened, or the message turned on frequently, do this troubleshooting procedure.