Home >> BMW >> 2013 >> 135is 2D Convertible, Automatic DCT 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 P1030; BMW DTC 133B04: VVT-Actuator Monitoring Position Control; Tight, no Adjustment possible (Bank 1) >> Fault code