Bosch/Siemens washing machine error E:03 (WFXD5201UC/01)?

Purchased a second hand Siemens washing machine, front load , about two years ago. Recently had a hanger rip the drum to door seal. Water everywhere. After replacing seal, washer ran up to the spin cycle, but stopped. Displayed code E:03. Would not drain water.
Cleaned out drain
Inspected and cleaned out every hose, including ball check.
Replaced drain pump assembly.
Checked door latch switch.
....all of this each time resulted in no drain and same code.
Please help!