Wainus

Like I said auto electrician came out and had a look Main error code was p0600 or something: ECU has lost connection with one of its controllers more than once. I'm attaching the report he gave me

So these three lights been flashing intermittently, sometimes just flashing, sometimes periods of time. When it does that, the Speedo doesn't work and it doesn't count the miles traveled. Also it says no/low fuel on the mfd, fuel guage needle sways about but still more or less right. The auto electrician says it's the abs controller unit which is on the abs pump. What is the part number for this or how easy is it to find? Any advice/info would be much appreciated It's 2008 pd140 TDI Lauren n Clemente Thanks