Hello. I have a problem with the Ford Transit from 2006 2.2 TDCi. I bought the car recently, there was a problem with wavy revolutions at a standstill, but this is not the end. The car had a weak battery and barely turned the starter at one point, it did not respond to turning the ignition. I bought a new battery and nothing. I gave the starter for regeneration and nothing. During diagnostics, an error occurred: U0100 Lost communication with ECM / PCM. I am asking for help, very urgent.