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View Full Version : what Runs when Door is opened



rpwils
10-09-2009, 08:04 PM
Does anyone know what turns on when the door opens that would be making a humming noise from the engine with the engine off?

philgood
10-09-2009, 10:04 PM
Properly fuel pump. Most modern vehicle will activate the fuel bump when driver door is opened to aim cold start.

rpwils
10-10-2009, 06:41 AM
Thats interesting. It run for a good 3-5 mins

AWD*V70XC
10-11-2009, 05:42 AM
I would agree with the fuel pump, mine does it and I was told it was something to do with the fuel management system, bleeding air from the system so that you have fuel ready to start next time..... don't know how true it is but they didn't want to replace anything so maybe it is... a dealer offering free advice and not making you replace something... nice :D