Technical Guides for the E90, E91, E92, E93, F30.
Been chasing down a problem now for a good few months. E91 335d MTEC intercooler, EGR delete, DPF delete, remapped and box flash. However occasionally it throws an EML and goes into limp mode. The two codes that show are P0030 (HO2S heater control sensor circuit bank 1 sensor 1) and P3002 (Fuel...