What does LG Washer PE Error Code - Causes & Fix mean?

PE means Pressure Error: the water-level sensor system has failed. Most often a kinked or clogged pressure hose. Check hose first.

How do I fix LG Washer PE Error Code - Causes & Fix?

Follow the step-by-step diagnosis below. The most likely fix is identified by checking power, sensor resistance, and control-board signals in order — using a multimeter and the part numbers documented in the parts reference table.

Can I keep running the equipment with this fault active?

Generally no. Faults on Appliance units are emitted when a sensor, safety, or control circuit is outside its operating envelope. Running through an active fault risks compressor, heater, or control-board damage. Diagnose and clear the fault first.

What part is most commonly replaced for LG Washer PE Error Code - Causes & Fix?

The most frequently replaced parts for LG Washer PE Error Code - Causes & Fix are listed in the Parts Reference section of this guide with OEM part numbers and typical price ranges. Check the table for direct replacements.

Is LG Washer PE Error Code - Causes & Fix a DIY repair or do I need a technician?

Sensor swaps, fan motor replacements, and condenser cleaning are typical DIY-level repairs. Anything involving refrigerant, gas, or high-voltage (>240V) work requires a licensed technician for both safety and code-compliance reasons.

LG Washer PE Error Code - Causes & Fix

LG Washer PE Error Code — What It Means

The PE error code on an LG washer stands for Pressure Error. It signals a fault in the water-level sensing system, specifically the pressure sensor circuit that monitors how much water is in the tub. When the machine cannot reliably detect the water level, it stops the cycle and throws PE to prevent overfilling or running dry.

You will typically see the washer behave abnormally before the code appears: it may fill and drain repeatedly, stop mid-cycle, or refuse to advance. The control board is not receiving the expected pressure signal, so it aborts to protect the machine.

Jump to Fix

Common Causes

Kinked, clogged, or disconnected pressure hose The small air tube running from the tub air trap to the pressure sensor can kink, fill with detergent residue or water, crack, or pop off its fitting, breaking the air signal.
Failed pressure sensor (water-level switch) The sensor itself can fail internally, no longer producing the correct voltage or continuity change when air pressure in the hose shifts.
Loose or corroded wiring connector The plug at the pressure sensor or the mating connector on the harness can work loose, corrode, or develop intermittent contact, interrupting the signal to the control board.
Damaged wire harness Wires between the sensor and main board can be pinched, chafed, or shorted, causing an open circuit or erratic readings.
Faulty main control board If the sensor, hose, and wiring all test good, the PCB may no longer be reading or processing the pressure signal correctly.

Step-by-Step Fix

Unplug the washer and wait three to five minutes to clear the error, then plug back in and try a rinse or spin cycle to see if PE returns.
Pull the washer away from the wall and remove the top or rear panel to expose the pressure sensor (usually a small round or rectangular switch mounted high on the tub or frame).
Trace the pressure hose from the air-trap fitting on the outer tub to the sensor and inspect the entire length for kinks, cracks, water inside, detergent sludge, or loose connections. Pull the hose off at both ends, blow through it to confirm it is clear, and reattach firmly. Replace the hose if it is split or remains clogged.
Check the pressure sensor connector for corrosion, bent pins, or looseness. Unplug it, spray both halves with contact cleaner, and reseat firmly. If you have a multimeter, check for supply voltage (typically a few volts DC) and verify harness continuity back to the main board.
Replace the pressure sensor if the hose is clear and connections are clean but the code persists. Unscrew or unclip the old sensor, transfer the hose and connector to the new one, and mount it in the same location.
Enter diagnostic mode (consult your model’s service manual for the button sequence) and verify that the control board registers a pressure change when you gently blow into the hose. If the board sees no signal even with a new sensor and clean hose, the control board is the remaining suspect.
Reassemble the panels, run a test load, and confirm the washer fills, agitates, and drains normally without throwing PE again.

Parts Often Needed

Part	Notes
Pressure sensor (water-level sensor)	Amazon \| Match your washer’s model number. Sensors vary by top-load versus front-load design.
Pressure hose (air tube)	Amazon \| Sold as a universal part or OEM by inner diameter. Measure the old hose or bring it to the parts counter.
Wire harness connector	Amazon \| Order the sensor-to-board pigtail if the plug is melted or the wires are cut. Crimp or solder carefully.
Main control board (PCB)	Amazon \| Required only if sensor, hose, and wiring test good. Confirm your exact model and software revision before ordering.

When to Call a Pro

Call a technician if you are not comfortable working inside a live 120 V appliance, if the pressure hose and sensor both look perfect but PE returns immediately, or if you lack a multimeter and service manual to run diagnostic mode. Board-level faults can be expensive, so get a firm quote and compare it to the cost of a new washer before authorizing control-board replacement. A pro can also check for rare causes such as a cracked outer tub or air-trap blockage that an owner may miss.