Engine Controls - 2AD8 EAC Sensor Code Stored/MIL ON

SI B12 16 07
Engine Electrical Systems

March 2011
Technical Service

This Service Information bulletin supersedes SI B12 16 07 dated January 2011.

[NEW] designates changes to this revision

SUBJECT
N51 - EAC Sensor Fault 2AD8

MODEL
E90, E92, E93 (3 Series) with the N51 engine
[NEW] E82 and E88 (1 Series) with the N51 engine

SITUATION

The "Service Engine Soon" lamp is on and the fault code: "2AD8 - EAC Sensor, monitoring - implausible in relation to engine coolant temperature, radiator outlet" is stored in the DME.

CAUSE
DME diagnostic software error

Note:
When performing the EAC function check test module, the EAC sensor may show an implausible temperature status, e.g., 0°C in relation to the ambient temperature. Since this function test is performed on a cold engine (< 40°C), both values should be similar.

CORRECTION

Reprogram the vehicle using the current ISTA/P version (2.40.0 or higher). The vehicle integration level after programming should be E89x-10-12-501 or higher.








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