The PE error in an LG washing machine is an indication that the water level sensor is unable to correctly detect the water level. This error can be caused by excess moisture in the environment where the washing machine is installed, such as a bathroom. If the same PE error is displayed after disconnecting and reconnecting the power plug, it is necessary to have the washing machine checked by an LG Electronics service technician.

According to, the PE error code can also be caused by a problem with the water level pressure sensor. If resetting the washing machine by unplugging it for three to five minutes does not work, the water level pressure sensor wiring and the sensor itself will need to be checked to ensure they are working correctly. If faulty, they will need to be replaced.

In summary, the PE error in an LG washing machine is caused by a problem with the water level sensor or pressure switch. If resetting the washing machine does not work, it is necessary to have the washing machine checked by a qualified technician or replace the faulty components.