2018 Fuel pump problem

[DeepSix]

There have been times when I've parked my car in the garage and heard the fuel pump continue to run after shutting off the engine. I can re-start the engine, shut it off quickly and the fuel pump stops running.
Anybody else experiencing this problem?

 

[Iowackers]

Are you sure it is the fuel pump? Not sure if Subaru does it, but many manufacturers do Evaporative Emission checks after key off. They run a pump to pressurize the system and monitor pressure drop. I know my Toyota Highlander does this randomly after key off and several hours later sometimes.

 

[DeepSix]

lowackers, thanks for your reply. I have never heard of the procedure you are describing. I can't even understand why any car would have to run a EE check. Why does your car perform this test?

 

[Iowackers]

It must be a govt required check of the evaporative emission system. It runs a pump to pressurize the system. If it detects a leak it sets a DTC for Evap system leak. Probably a CARB deal. California likes to be more strict on emissions than the feds.

 

[DeepSix]

Thanks, again, for your reply.

 

[MattC]

There have been times when I've parked my car in the garage and heard the fuel pump continue to run after shutting off the engine. I can re-start the engine, shut it off quickly and the fuel pump stops running.
Anybody else experiencing this problem?

It could be a stuck relay

 

[DeepSix]

MattC, thanks for that suggestion. I'll try that the next time it happens.