BMW VEHICLES: DIAGNOSIS FOR LOW PRESSURE FUEL SUPPLY FAULTS. THE SERVICE ENGINE SOON LAMP IS ILLUMINATED (A FUEL PUMP MALFUCTION MESSAGE IS DISPLAYED IN THE CC), AND A COMBINATION OF THE FOLLOWING FAULT CODES MAY BE STORED IN THE DDE CONTROL MODULE: 4BED/4BDD FUEL PRESSURE CONTROL, CONTROL DEVIATION (PRESSURE TOO HIGH/TOO LOW); 4BDB FUEL PRE SUPPLY PRESSURE CONTROL, CONTROL DEVIATION/NEGATIVE AND 6292 CONTROL VOLTAGE TOO LOW, IMPLAUSIBLE SIGNAL CURRENTLY PRESENT. *PE