Cabrio washer not completing cycle OL code

The washer will not complete the cycle. It will shut off and show the code uL. I usually have to manually turn the knob to "drain and spin" to get it to finish, but my clothes are not getting as clean as they should. I think it’s shutting off in the "rinse and spin" cycle because I’ve tried to manually turn the knob to rinse and spin and it gave me the same "uL" code. Any ideas?