[Solved] Citroen C-elysse 1.6 BlueHdi 2015 BHY: U3FFF Fuel Pressure & P1631 ECU Fault - 30k Miles

Hello
I have a problem with a Citroen 1.6 BlueHdi, 2015 BHY engine. The car starts and then dies. The car goes ahead after the bell. Airbag system replaced. Errors that return after trying to start the U3FFF Fuel high pressure circuit. Fuel pressure lover than the reference value.
P1631 engine management Ecu internal fault. The high pressure pump does not produce enough pressure for the engine to run. I checked the electrical installation and the power supply to the electric pump, which works. Fuel pressure approx. 5 bar when the electric pump turns on. The car has a mileage of 30,000, so the toilet pump is unlikely to be damaged. Maybe someone had a similar problem to mine and can help me with it.

Flow valve, injectors, fuel pressure sensor, engine-ECU installation, i.e. a complete diagnosis.
5 bar of the feed pump, and what is the pressure of the CR pump?

Well, the pump does not produce any pressure at all, as if it were defective. Only fuel does not flow from the lines when the electric pump is running.

Hello
I have a similar problem. What was the problem for you?

The problem was in the engine controller. After opening it, it turned out that there were burnt places, as if the controller had a short circuit. We bought a used one and made a copy of ours, and the car runs great.