how can i fix my washer?

I am getting an error code oe on lg front load washer. At first would not drain after wash cycle, so I have taken out drain pump and disconnected and made sure no blocks in pump or lines, so I put on drain and spin cycle and pump works. Put back together and did a short cycle and it washed and drained, but did not go into the rinse cycle, and gave the error oe.. Any help would be appreciated.