Hi everyone, just bought a 04 430 two months ago. Fab car and way better then theS500 i had before it. Intermittantly it will throw the above fault. Engine light will go off in a few days on its own or if i clear the fault when it happens.. code is intake tuning valve...anybody any ideas...thanks..Brian

 

it's vacuum solenoid valve ('vsv for acis') under the intake. bummer to replace, costs about 100 bucks itself. common fault.

 

Great.thanks for that.ill let you know how it goes.