Home >> BMW >> 2013 >> 135is 2D Convertible, Standard Trans >> Repair and Diagnosis >> Engine Performance >> System >> Self Diagnosis - N55 - Diagnostic Trouble Codes - DTC P0234 (BMW DTC 120208) Through DTC P10F6 (BMW DTC 135B12) >> DTC P3018; BMW DTC 12BD50: Oxygen sensor before catalytic converter, pump current line: lambda control value above threshold due to open pump current line >> Fault code