I located a service bulletin for this problem.
Maytag Dishwasher--->Stuck Drain, F9E1 Error Code
It is possible that consumers may experience slow or no drain, a noisy pump, or a dishwasher that does not complete a cycle. Customers may also see a F9E1 error code (for display models), Blinking Clean Light (for non display models) and/or that the pump does not fully drain out the water. There are multiple potential causes and corrections.
Check all possible causes including:
--->Pump with metal or plastic impeller cracks
--->Pump low or high ohms readings
--->Control board electrical problem
--->Wire harness connection or routing between the ACU and pump damaged
--->Drain clogged by unknown-blockage or debris
1. Disconnect power from the appliance.
2. Remove the retained water by sponging out the tub and sump with a sponge and bucket.
3. Next, uninstall the pump.
4. Inspect for traces of the pump’s components.
5. Any pieces recovered/ collected from the pump, lay them next to the uninstalled pump and compare the pieces to the image below. This is a precaution to prevent any close to false subsequent events of a stuck drain.
Another person had this same problem, here's our main thread on it:
My dishwasher started what I can only describe as a "grinding" noise, about 10 minutes or so into a cycle when I think it is draining. The cycle continues for a minute or two, and then stops with error code F9 E1 (drain pump system problem - long drain). I checked the lines and nothing is stuck...
Here's the drain pump for your model: W11497943
Since its under 1 year old, contact Maytag at 1-800-344-1274 to come out under warranty and fix it for free.