cannot clear suds code

If you provide me with the model number and make I can help you better. You can try unplugging unit for 10 mins. That might reset it. If not you will need to enter diagnostic mode to clear the code. WIth out the model number I am unable to look that up for you at this time.

What is the model number? What error codes are you getting?
You could have soap trapped in your air tube going up to the pressure switch.
Remove power for a few minutes to try and clear the computer.
You should try running the unit empty, no soap, no cloths and see if it completes the cycle. If it does I would recommend running another cycle with a washing machine cleaner to help remove any residual soap left in the unit.
If you are unable to run a complete cycle empty, chances are you will need to replace your pressure switch. If you replace your pressure switch I would also make sure the hose to the switch is clear of soap.