Have done over 100 miles since replacing cam position sensor and maf sensor in my 94 850 est. and had no problems. I noticed after a run the idle air control valve makes a buzzing sound and vibrates slightly for a while after ignition switchrd off, then a relay clicks (located in the carrier on top of the radiator) and it stops. When ignition switched on again valve buzzes but stops as soon as ignition switched off.
Is this normal?
Tis a 20valve non turbo with LH3.2-Jetronic engine management system.
Kris.

 

The idle motor sometimes takes a few seconds to reset after the ignition has been switched off.

 

Thanks tech, hope that means its a "if it aint bust dont fix it" situation

 

Leave it for now.

 

Same problem on my 2000 S80.

As soon as I open and shut the door I hear a buzzing noise coming from the radio/hvac control area. It last for about a minute then stops.

What is it?

When the car is running it can still be faintly heard.
When I turn the key off and remove it the buzzing continues for about 50 seconds, first the interior lights turn off then 20 sec. later the buzzing stops.

What needs to be repaired? Not a sound I want to live with!
Hopefully this is not considered "normal"

Also, how do you remove the panel to access the buttons for the STC and Trunk Lock?