Home >> BMW >> 2011 >> 335i 2D Convertible, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Self Diagnosis - N55 - Diagnostic Trouble Codes - DTC P10C9 (BMW DTC 10BA42) Through DTC P0001 (BMW DTC 11C404) >> DTC P2178; BMW DTC 118F21: Mixture adaptation, lower speed range: mixture at part load too rich >> Fault code