LG Dishwasher Error Code PE

The PE error code means the dishwasher's control board could not detect the position of the synchronous distributor motor within 5 minutes of operation beginning. This motor controls how water is directed to the spray arms, and a micro switch provides the position feedback the control board needs. When that signal is absent or delayed, the PE fault is triggered and the cycle stops.

No, you should not continue running the dishwasher while the PE error is active. The code indicates the water distribution system is not functioning as expected, meaning dishes may not be cleaned properly and the appliance may cycle incorrectly. Continuing to run the machine without resolving the fault can place unnecessary stress on the motor and pump components.

A reset may temporarily clear the PE error code, but it will return if the underlying problem is not corrected. The code is triggered by a real detection failure in the motor or micro switch circuit, so the fault will reappear once the next cycle begins and the control board again fails to receive a position confirmation signal. A reset is useful for confirming whether the issue is intermittent, but it is not a fix.

Some causes of the PE error are DIY-friendly, particularly checking and reseating the wiring connectors at the distributor motor and micro switch. Clearing a mechanical obstruction from the diverter area is also something a careful homeowner can attempt. However, replacing the micro switch or synchronous motor requires basic electrical testing with a multimeter and comfort working with dishwasher components, so those repairs may be better suited to a technician.

Repair costs depend on what component has failed. If only a connector needs reseating or cleaning, the repair may cost nothing beyond your time. A replacement micro switch typically costs between $10 and $40 for the part. Replacing the synchronous distributor motor can range from $30 to $100 for the part, plus labor costs of $80 to $200 if a technician performs the repair.