P0404, P0490, P0190 & P0251 Fault Codes on 2003 Ford Mondeo 2.0 TDCI - Diagnosis and Solutions

Hi there, I own a 2003 Ford Mondeo (Europe) with a 2.0L TDci engine (115 PS), model codes HJBA or HJBB, having covered approximately 278,000 km. Recently, I've noticed inconsistent engine behavior during acceleration—specifically around 300-3500 RPM—the engine enters an emergency mode and stalls if overloaded. However, under normal driving conditions without excessive load, the vehicle runs smoothly. As a car dealer technician, I used an OBD-II scanner to retrieve diagnostic trouble codes (DTCs), which include: - P0409: EGR Sensor A Circuit - P0404: EGR Regulator Circuit Range/Performance - P1000: OBD II Cycle Not Completed - P1211: Injector Control Valve Position Outside Desired Range (Engine Running) - P0190: Fuel Pipe Pressure Sensor Circuit Malfunction - P2288: Injector Regulation Pressure Too High - P0251: Fuel Pump Fuel Meter Control A After resetting the codes without starting the engine, the following reappeared: - P0490: EGR Sensor A Circuit - P1000: OBD II Cycle Not Completed Although not all P-codes are consistently detected, I've identified potential issues related to the EGR system and fuel injection components. My neighbor suggested that one of the injectors might be clogged, causing abnormal pressure buildup—this could explain why the engine struggles under load and triggers overpressure warnings. I'm seeking input from experienced users or technicians familiar with these specific fault codes on the 2003 Ford Mondeo TDCi. While I understand that some error messages are in Dutch (e.g., 'OBD II cyclus niet voltooid'), the technical context remains clear. Could anyone confirm whether these codes point to a known issue, such as EGR malfunction or injector failure? Are there common fixes for this combination on this model year and engine type?