Some more:
Peeeeeeeeee... (continuous high pitched whine)
WHERE: Somewhere towards the back of the car (hard to localize)
WHEN: While the ignition is at the "engine on" position. Sound may stop momentarily if the engine is not running and the key is still in the "engine on" position, noted before starting the car.
WHAT: Fuel Pump (inside the petrol tank usually under the rear seat)
URGENCY: Depends on the make and model of your car. Some cars just do this, but if you have never heard it before and it has started recently, it could be your fuel pump planning for its retirement.
FIX: Get the fuel pump overhauled, replace fuel filter.
Tap tap tap tap... tap tap...
WHERE: From behind the car towards the center, mostly heard in hatchbacks
WHEN: While driving at high speeds / over uneven roads
WHAT: Rear numberplate fixed only at the top with a gap at the bottom
URGENCY: Slight risk of wearing out the paint below the plate, high risk of driving yourself crazy!
FIX: Wedge some thermocol into the gap at the bottom of the plate. |