2002 E39 525i - Engine. Deterioration of exhaust emission

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  1. 2002 E39 525i - Engine. Deterioration of exhaust emission 
    #1
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    Markgolf62's Car Details
    Model of Car:
    525i
    Year of Manufacture:
    2002
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    Hi,new member.
    My e39 525i has had the air flow? sensors changed but engine warning
    light has come back on.
    Any ideas ? Handbook says emission control values.
     
     

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    #2
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    Ferret's Car Details
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    330Ci
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    If the warning light has come back on - Then get the codes read... It could be a new fault.
     
     

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    #3
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    Deano16v's Car Details
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    probabbly a split air pipe after tha MAF sensor mate.
     
     

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    #4
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    Markgolf62's Car Details
    Model of Car:
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    We reset it 3 times and all seemed ok.
    Half hour later light back on.
     
     

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    #5
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    Deano16v's Car Details
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    the pipe after the MAF that joins to the TB is a bugger mate, it bends at 90 degrees and often splits on the elbow.
     
     

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    #6
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    Markgolf62's Car Details
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    Cheers, will check it out.. Thanks.....
     
     

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    Andy_1984_25's Car Details
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    hi i noticed you reset three times... how do you reset the light please?
    thanks andy
     
     

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