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Engine Controls - MIL ON/Code 278A Stored In Memory

SI M12 04 07
Engine Electrical Systems

November 2010
Technical Service

This Service Information bulletin supersedes SI M12 04 07 dated June 2007.
[NEW]designates changes to this revision

SUBJECT
[NEW]The Service Engine Soon Lamp Is On with Fault 278A Stored

MODEL
[NEW]R56 with the N12 engine produced up to 7/23/2007

[NEW]SITUATION
The Service Engine lamp is on with the following fault stored:

278A fuel mixture adaptation, idling per time unit system too rich

[NEW]CAUSE
DME software diagnostic sensitivity

[NEW]CORRECTION
Follow the diagnostic test plan B1214_M_GEM_G, using ISTA/D 2.22.0 and higher.

WARRANTY INFORMATION
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