Technical Service Bulletins

Confused Temperatures

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Confused Temperatures

This bulletin applies to 2009 BMW 328i vehicles equipped with the N51 engine. The “Service Engine Soon” lamp may be on, accompanied by fault code 2AD8-EAC Sensor, monitoring – implausible.

The cause is DME diagnostic software error.

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

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

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