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Testing for fault WITHOUT light ON!
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Default Testing for fault WITHOUT light ON! - 4th June 2018, 08:42 PM

Hi folks, (R56 2009 MINI)
My engine management light came on a couple of weeks ago after running low on petrol. There is a slight mis-fire (idling) going on so I booked it into the dealers. I have always had the dealer collect my car from the house and deliver it back after whatever (service/MOT) due to work commitments.
I always contact them a month in advance as this service requires plenty notice. She's booked in for 19th June.
Since then the light has gone out and the car runs smoothly for a couple of days then light comes back on and problem returns, this has happened a few times, fine one day, not so the next and so on.
My concern is - what if the light is out when the dealer guy picks it up on the 19th and she drives smoothly that day?
Will they be able to detect the fault, though the light is not on?

Cheers, any advice welcome.


  
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Default 5th June 2018, 11:19 AM

I had a similar issue but with an Audi TT it was coming on and off for years usually around when I filled it up with Petrol it turned out to be a carbon filter in the engine was clogged up and needed replacing

My car was showing an error when they read the codes though even when the light was off so I'm sure when they plug yours in they will see and they can look the the history stored in the ECU of error codes too


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Default 5th June 2018, 04:52 PM

That's superb mate, thanks for your reply.


  
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Default 2nd July 2018, 02:01 AM

Just to update: The fault turned out to be a 'Camshaft sensor' needing replaced.

A little surprised this was the diagnosis given I thought it may have been in relation to running the tank down to fumes only. I've been driving the car for two weeks now since the problem was sorted and have to say she's running perfectly. The cost to me from BMW Mini in Glasgow came to a whopping 218.50. Can't complain really can I?


  
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