Fault codes. Engine malfunction

codes showing U0073,u0155,U0131,U0121,U0140,U0001,P1934, -
Hello, I am new to this forum and could really use some help. I recently bought a 2007 ford cMax 2lt tdci. I keep having problem where when driving usually quite slowly and power steering malfunction light shiws, quickly followed by either limp mode and engine malfunction message on dash. Or abs warning and light. If I pull right over and turn off engine it will not restart. But today I slowed to stop, left running and waited second and then drove in limp mode back home. Once home turned off engine and tried to restart. It struggled to start normally had to give bit of revs. I had the crank sensor changed. Had mechanic check all connections but he can't find problem and is saying I need to send computer to get tested?? Codes which come every time it happens are. U0073,u0155,U0131,U0121,U0140,U0001,P1934. Please any help would be much appreciated.  Thanks