William U Florence , MS March 13, 2018 Appliance: Frigidaire Dishwasher FGID2474QB0B I20 i30 Replaced the pressure sensor and added the supplied air lock to help correct future fouling inside the sensor. This will be the fix for most if not all i20 i30 codes as well as water in the pan and the drain pump continuously running. The pressure sensor tells the fill valve to shut. If it doesn’t then the washer will over fill into the tube, and the float will send the error code. Read More... 4 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes Tools: Screwdrivers