Hello, welcome to FixYa.
You mentioned you checked the hose, yet based on your description it sounds like a pump isse.
I would start by checking the pump for lint or other debris which may prevent it from draining properly.
**Unplug the washer from the wall or turn off the breaker at your service panel...safety first**
Here`s how...Start by removing the bottom front panel which provides access to the drain pump and manual door lock release.
1) Carefully lift and block (up with a 2x4 or egual block of some type) front of washer to provide access to screws along the bottom which are angled slightly.
2) Remove three (3) screws, then carefully slide panel down and away from washer.
3) You should now see the pump access filter to your right, as such...
4) The pump has a small tub connected to it which will allow you to try and drain the water from it before removing the filter.
5) The filter will unscrew counter clockwise...careful it likely has water in it. This is where a wet-dry shop-vac comes in handy....or a nearby floor drain.
6) Now pull out the trap and visually inspect the inside of the pump as well as the filter/trap. Hopefully you'll find the item/debris that initiated the error code.
7) After removing any debris or obstruction`s re-install the button trap/lint filter and plug the washer in to power or reset the breaker and give it a test.
8) Run a load and watch for leaks. Leave the pump access panel off until you are sure you screwed the cap in tight and there are no leaks.
Ultimately you may have a faulty drain pump, but I would certainly start by performing the things I listed first.
Let me know if you require further assistance and if not and this solves your problem, please rate the solution I provided accordingly.
Thank you for coming to "fixya" and good luck.
macmarkus :)