Problem with drain between dishwasher and house drain or house drain restricted
The manufacturer has assigned this error or fault code to indicate a possible obstruction in the drain system. Check drain hose. If clear, check for a restricted drain valve in the pump assembly. If the drain line is not obstructed or restricted there might be a problem with the pump impeller or motor. Note: if you recently replaced the garbage disposer under your sink, the installer may have neglected to remove the plug from inside the hose fitting on the garbage disposer.