I have a 2009 Peugeot Boxer 2.2 hdi engine code 4HU with 88kw.

The van arrived by tow truck.
I diagnose, engine ECU not communicating. I check all power supplies and can line, all OK.
So I decide to open the control unit and discover that it is burnt out (the customer has reversed the start-up cables).
I order a used ECU, have it programmed, but I get P062b (injector control, internal fault) and P0200 (injector control circuit) as errors.
I check the injectors (they give me an impedance of 0.9 ohms) and the pressure regulating valve, which, by the way, can be controlled by diagnosis and works.
So I think I've found a faulty control unit, I'll get another one, but I'm back to square one.

The engine control unit is a Visteon DCU102.

Has this problem happened to anyone?