SOURCE: lg front loader washer error code-PE. Hi, PE error code means there is an pressure sensor error in your machine. You need to check pressure it will be giving incorrect indication.Pressure switch is faulty you need to change it.e: error code PE on top loader(LG). Model: WFT8501 Country: Canada Error Code: PE I am new to this forum. I followed the suggestion above and blew down the clear, plastic tube, and turned on machine, and walllla, it worked. My wife was amazed.