Ive got problems with my 09 1 series cold start only. Starts from cold missing and very rough idle and black smoke out the back unburnt fuel . Plugged it in and ive got PO300-301-302-303-304 witch is cylinder misfire so in went a set of plugs the old ones were shot and well worn. The other code was P124C (Nitrogen Oxide Sensor Operating Readiness Signal Not Available At Start) so i put in a pre CAT lambda sensor. Its starts better but not 100% for sure. Its great when warm/hot.
Has anyone else come across this problem ...
