If the filters have not been done in a while, do them. Perhaps try and reset the computer.
When you do the filters make sure to check that the strainer in the tank (if it has one) is clean.
A few years ago I was using JD 1075 combine and the thing was not doing the job 100%, first thing I did was change the main filters, no difference, then we changed the main drive belts and still no better and then towards the end of my contract I noticed that there was an after market auxiliary fuel pump down in behind the fuel tank and it had a strainer filter built into it, pulled it off and cleaned. The machine was like new after that
Anyway your problem may also be air getting into the fuel supply but at this stage I would concentrate of fuel filters/strainers/blocked pipes, as I would expect a faulty computer to have self diagnoses function.
I would also think that if a computer problem occurs it would go into limp home/bypass mode but I don't know much about computers on machines and generally prefer a big old lever to give me grunt, instead of a cute little button.