BMW fault code 2715
Engine electronics
DME: Oxygen sensor heater before cat., bank 2 (CDKHSV2 Oxygen sensor heating upstream of catalytic converter Bank2)
Module version: Motor Electronics (ME9K42)
In: 3 Series (E46) 1998–2006
Reading and clearing it
Fault code 2715 is a BMW code, stored in the car's engine electronics, not a generic OBD2 code (P0xxx): a generic OBD2 reader only reaches the engine's emissions faults, so it won't show it. AutoLingo for BMW reads it with BMW's own diagnostic protocols, in plain English, with the details the module stored about it, and clears it after a repair. If a fault comes right back after it's cleared, the problem is still there.
The engine electronics is on: 8 Series (E31), 5 Series (E34), 3 Series (E36), Z3 (E36/7), 7 Series (E38), 5 Series (E39), 3 Series (E46), Z8 (E52), X5 (E53), X3 (E83), Z4 (E85), Z4 (E86)
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