Engine problem, overload alarm on new 5 series

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  1. Engine problem, overload alarm on new 5 series 
    #1
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    gutthoo's Car Details
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    Hi,
    I am new to the forum and just joined to seek any helpful suggestion/ information for fixing my car.
    I have a 525 SE petrol (new type 04 reg) which gives engine management alarm. The sympton is like:

    On motorway when speed is high and specially when rpm is above 3000, there comes engine alarm and engine stops automatically, i.e. grinds to halt. Error message on display shows "engine under overload condition, drive carefully". You give 5 minutes and you can restart the car, but then it moves very slowly and then stops again. You cool it for say 20 minutes and then it drives smoothly.

    With above symptoms, I showed it to local independent BMW expert, who first diagnosed problem with thermostat. When I got that replaced and serviced, then now they say air sensor needs a replacement and then we will check for further problem. I am happy to get it replaced, but they dont say that for sure this is the problem!

    Have you come across such problem, can you suggest what could be the problem or if this is a general problem.. Surprisingly driving locally (say under 50 mph) there is no problem.
    Thanks!
     
     

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    #2
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    matthew_henson's Car Details
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    Quote Originally Posted by gutthoo View Post
    I showed it to local independent BMW expert
    Be careful of these so called experts, some (but not all of course) were very expert in pre 1990 BMW and not the new fangled ones.

    Before you start replacing stuff willy nilly, get the fault codes read and understood, it be caused by a number of things
     
     

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    #3
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    gutthoo's Car Details
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    525
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    Thanks Matthew for your reply it is much appreciated,
    and sorry it took some time to get the code. The error message is
    28A2 Air flow sensor fault
    Please let me know if this is sufficient info to replace the sensor, or we need some more information.
    Could there be some more fault.
    Just a history,,, 6 months before some "breather valve" of the engine was replaced on the pretext that the engine was consuming more oil.

    Really need your help and expertise to fix this. Any recommendation of garage/ parts (near Swindon) will be gratefully accepted.
    Kind regards
     
     

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    #4
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    matthew_henson's Car Details
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    I use ND's in Aldbourne, they are truck mechanics and know their stuff, but yes air flow sensor is a normal fault to expect on a modern car, there are quite delicate things, if you replace the MAF sensor (that is what it is called) make sure you use a like for like replacement, they are more expensive but don't need coding.
     
     

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