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Cold Start Problems 1 Series 116i

Giles
in BMW 1 Series Forum

Featured Replies

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 ...  

  • Quote

    Afternoon Giles

    Welcome to the Forum

    I daresay the Crank Case Ventilation system will be sooted up, check all the Vacuum lines and replace if clogged. The last thing would be Coil Packs 

    A diagnostic session with INPA?ISTA would tell you much more.

    Dave

  • Quote

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