Hello,
My father is the owner of 2002 Altima and he's been complaining about a noise he's been hearing from somewhere under the hood of the car. It seems to occur most often when the car comes to a stop and he refers to it as a chirping sound, but to me it sounds like some kind of a small electric motor is "reving" up (it only lasts a couple of seconds). He's had it to the dealership and at first they didn't know what it was but now are telling him it is normal and has something to do with "air intake valve" (or something like that). Does anyone know what I'm talking about? (my apologies if this is rather vague, but I'm really not much of a "car person" to begin with).
TIA,
Greg