Home >> BMW >> 2007 >> 335i 2D Convertible, Standard >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Self Diagnosis - Diagnostic Trouble Codes - DTC P0010 - P14C6 (N54) >> BMW MSD80 >> DTC P0420, BMW Hex Code 0x29F6, BMW Code 10742: Catalyst System Efficiency Below Threshold (Bank 1) (MAX) >> BMW Fault Code Description VS-Text