E4 fault code

Hi, when a dishwasher goes into overfill mode it usually means that the bottom tray has water in it that operates a float connected to a microswitch. Open the bottom panel and soak up all water then check to make sure the float is down completely.then restart dishwasher. Why it has overfilled is another problem. It could be a faulty pressure switch,pressure switch hose may have a hole in it, water valve may be faulty. Too much soap or wrong soap can cause too many suds and hence overfill.Also if rinse aid is spilt when filling. Or seals leaking. etc.