What does it mean 3973 computer error in man tgx 26. 440

I have this trouble. the mechanic told me that he did not know what does it mean.
Does somebody can help me. I have a big oil consumption. I am not quit sure where is exactly the problem?

EDC 17, Charge pressure in high pressure circuit. Sounds like the dreaded Hi pressure intercooler might be starting to fail, is the wagon losing any coolant out of the top of the radiatorâ– â– ?, if so get it into a dealer and get it diagnosed asap, the last thing you want is it giving up on the side of the road !!!