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Home >> BMW >> 2014 >> 535d >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Self Diagnosis - Diagnostic Trouble Codes (N47 & N57, Diesel) >> Fault Code Tests >> DTC P18AA: BMW DTC 21A121; DME -- Safety Function Neutral Request Via Can >> Fault description

Fault description

This is an event fault entry by the emergency manager. There is a transmission fault of the electronic transmission control that requests a substitute response from the DME. This fault does not indicate a fault in the DME.

Fault monitoring conditions:

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