A fuel vapor pressure management apparatus for an internal combustion
engine includes a housing, a pressure operable device, and a printed
circuit board. The pressure operable device moves between first and
second configurations with respect to the housing. The printed circuit
board is supported by the housing and includes a delay and a sensor. The
delay commences upon internal combustion engine shutdown and concludes
after a preset period. And the sensor indicates movement of the pressure
operable device in the first configuration after the conclusion of the
preset period.