2011 mercedes sprinter possible ecu fault please help

[Borisyonka7]

Hello everybody. I have a 2011 313 cdi sprinter.
906.333
2.2 651.956

I bought the van with poasible injectors problem. Bring it in garage for diagnostic where all 4 injectors were leaking. Except for that i had a lot of other ecu faults and EML lamp was flashing. Van was able to start with easy start spray but running bad and missfiring. Some of the faults :
P 0123 -15
P 0409 - 1C
P 0697 -16
P0103 - 15
P0344 -31
P0263- 54
P0269-54
P0272 - 54
P0266 -54
P 252B -29
P0409-1C

BASICLY lots of problems.
Been told ecu is faulty and ecu is sending 1.5 volts instead of 5v which makes all these faults come. And injectors as well and air mass sensor.
Bough another ecu and transfered all the software from my old to the new one.
Ecu is : a6519002600
Crd 2.30
Fv 08.15
Hw 08.50

After new ecu was fitt3d van started without any problem, but still all these faults and many more came trough. And they dont clear at all. However EML light is gone.
Still havent fitted air mass and injectors.
Please help. Desperately looking for any advice because obviously garage here cannot do it and i paid for diagnostic , solved the problem with ecu and still all these faults.

 

[Tonygw]

I'm no expert, but do the injectors need to be coded / calibrated to the ECU?

 

[Borisyonka7]

I'm no expert, but do the injectors need to be coded / calibrated to the ECU?

They need but i still havent fit them. First need to take care of ecu faults

 

[Tuercas viejas]

Questions
Where did you source the replacement ECU from?
Second
Has anyone looked at main circuit voltage, ECU threshold voltage , and all grounding issues/integrity (sorry erfs) through the diagnostic connector., and main ground points on the frame , including the main battery negative and chassis grounding cable off the engine mounting foot to frame rail. ?
Tuercas Viejas