? SI B12 42 15November 2015 Engine Electrical SystemsTechnical Service This Service Information bulletin supersedes SI B12 42 15 dated November 2015.. A Delivery Stop has been issued on certain G12 vehicles produced from July 1, 2015 to November 2015. On the above mentioned vehicles, the Lambda sensor diagnosis would not be able to reliably detect an aged sensor. This action will prevent this situation from ever occurring.
