1999 E46 318i EML light on after idle


Thread: 1999 E46 318i EML light on after idle

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  1. 1999 E46 318i EML light on after idle 
    BMW Crazed
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    markyp's Car Details
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    318 SE
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    May 2009
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    Hi, the problem is after the car has been run, when I come to a stop and the engine is idleing the EML light comes on (it seems to happen as soon as I start to let the revs rise after idleing).
    My peake tool says the error is (table 27, code Ab - check fuel supply system) I understand this (Peake)error code relates to (Fault code 171 mixture too lean or P0170 Fuel trim bank 1 malfunction. Most likely you have a air leak after the Air flow meter or before the Lambda sensor.) - Thanks Ronnie. But i can't find/hear any air leaks in this area, nothings obvious, the rocker cover to CCV hose is old but looks ok - would a faulty CCV cause this?
    The car generally runs well, but I have started to notice that on full throttle openings it is a bit lumpy

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    Ronnie's Car Details
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    See above
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    Never too old, never too new
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    Always manual
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    Usually 5 doors
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    Dec 2007
    Bournemouth, Dorset.
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    Usually you can hear a kind of whistling/sucking noise from the little triangular vent on the top of the crankcase valve if they are bad. Otherwise it "could" be a lambda sensor problem, if you never have a problem when the car is cold then this would help confirm it, as the ECU doesn't use the Lambda sensor when cold. (open loop)

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    markyp (20-06-2010)

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