Use caution
Bosch associates E22 with a blocked filter or another obstruction in the dishwasher's drain path.
Source scopeBosch US dishwasher support
Applicability boundaryBosch groups E22 and E-22. The exact manual controls which filter or drain checks are user maintenance.
Safe next stepClean only the user-removable filter described in the exact manual and inspect the visible drain hose. Do not access internal pump parts unless the manual expressly treats that as user maintenance.
Sources: [1]