My Neff integrated dish washer is displaying error code 9

Bosch and Neff machines generate the same error codes..

E9 is an overfill problem. It's putting to much water in and overfilling.
If you wanted to check yourself you will need to take off the inspection cover on the front and locate the pressure switch if it's at the front. If it's not then you will need to pull machine out and take off the side panels. When you have found the pressure switch it will have a thin hose going to it and it will be round and have a few wires on it. Take this hose off and blow hard through it to clear any muck out.
Refit the hose and retry machine. Hope this helps..