Thanks for that.
If you have just the wash and end lights flashing then this is a pressure switch problem.
Now for this it can be a few things causing it.
First remove the mesh filter inside the dishwasher and turn it over and give it a good clean out. As these can get slimed up on the underside.
If that's fine then the wash motor can also cause this. As it goes weak and cannot pump the water around the system so this messes the pressure sensor up.
Then you also have the pressure sensor as well which can fail.
So when you set it going once its filled do you hear the wash motor kick in and spray the water around?
If not then this can be a sign then wash motor is the fault as I replace a lot of these motors as they go weak and stop running so its not uncommon for them to fail.
But if the motor is fine and the mesh filter is clean then you need to access the pressure sensor under the dishwasher and give it a clean out or replace and see how it goes from there.
Try the above and see what you find. But for the error code you have this isn't the easyist one to fix as it can be a number of things causing this.