Question about 1999 BMW 323 Series
The check engine light could be almost anything, from bad O2 sensors to problems with misreading the ECU.
Since you car turns off by itself, I would say that's a major electrical failure, it could be cause by a corroded ecu....
my bmw experiences lead me to the wet eci box.
the ecu compartment is under the windshield on the passenger side on E36
you gain acess to it under the hood....
this compartment gets wet, the ecu lays on a flat surface in that
the bottom side of the circuit board gets wet and starts corrosion.
remove the ecu, take the bottom plate off, clean the bottom of the circuit
board with alcohol and a soft tooth brush.
you should be able to see the signs of corrosion or conductive build up.
this gunk bridges solder points doing all sort s of wierd things to your
car, including false sensor readings from asc/abs controllers and other
all the way to engine failure and worst case burnt and shorted wiring
I'm on my 3rd ecu, took me and the repair boys a few years to figure this
BTW: i would get that ecu mounted above that flat surface, use some sort
of standoff to raise it so that it is not laying in the wet.
Posted on Feb 07, 2010
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Posted on Jan 02, 2017
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