"FC 481B05: EKP, Pump Insufficient Speed. The customer may complain about any of the following: ? Reduced engine performance when driving ? Engine jerking/bucking ? Engine no-start condition The Check Control messages ""Fuel pump/drive with care"" and ""Engine fault/reduced power"" are displayed in the CC. The fault code 481B05 (Pump speed/fuel pump control insufficient) is stored in the EKP module. CAUSE Electric fuel pump control module (EKP)"