Home >> BMW >> 2010 >> 760Li >> Repair and Diagnosis >> Engine Performance >> System >> Self Diagnosis - N74 - Diagnostic Trouble Codes - DTC P10C4 (BMW DTC 11B201) Through DTC P12D6 (BMW DTC 12CE01) >> DTC P123D; BMW DTC 12C502: Nitrogen-oxide sensor, sensor poisoning: binary lambda signal too rich >> Condition for fault memory entry