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Help! Acd showing 3 lights on my 7!

2K views 2 replies 3 participants last post by  Lancerlot 
#1 ·
This morning, on starting up the car,a 7. I heard a strange buzzing noise.Then all three lights on the dash ACD selection came on(tarmac,gravel,snow)
The hand book says go to a Mitz. dealer!
Has anyone had the same problem?What can I expect is wrong?
A friend mentioned it could be air in the system and it would need a simple bleed.
Please HELP ...very nervous about a big bill! No warranty!
 
#2 ·
when all three lights come on it indicates a "fault", however it could be anything as there is only one indication system................
the noise you heard could be the pump trying to prime the system, and become very noisey because of lack of oil
 
#3 ·
Had the same problem recently & it turned out to be a faulty engine airflow sensor. This was preceeded by a buzz from the engine bay. Your fault may therefore have nothing to do with the tranmission system. A diagnostic test should sort it out.
 
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