Hello Wayne, I'm a loyal customer of yours and wanted to run something by you. I have a 97 M3 and recently pulled three CEL codes using my Peake tool. First code indicated fuel injector cylinder 3, 2nd and 3rd codes indicated AfterCat O2 Sensor heater, cyl 4-6 and AfterCat O2 Sensor Voltage, cyl 4-6. I'm going to check the relay for the O2 Sensor. I had read somewhere that the fuel injector code could cause the o2 sensor code, is this possible? Performance of the vehicle seems fine, however I am getting some grey/white some when the car initially fires up, but goes away. Is this related or do I have yet another problem on my hands? Love these cars.
Thanks
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Pelican Technical Article: BMW 3 Series (E36) Oxygen Sensor Replacement