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PE

LG PE: Water level pressure sensor fault

PE means the control board is getting an incorrect or implausible water-level signal from the pressure sensor. The machine can't reliably tell how much water is in the tub, so it halts.

May need a technician

By the FixByModel editorial team · Verified 2026-09 · Researched against manufacturer support & repair references (below)

Most likely causes

  1. Pressure sensor hose loose, kinked, cracked, or clogged with residue
  2. Faulty or drifting water level pressure sensor
  3. Loose or corroded wiring between the sensor and control board
  4. Main control board fault (less common)
Before you start — unplug the appliance and turn off the water supply. You'll be working near water and electrical parts, and drained water can be hot. If a step involves the pump, wiring, or opening the cabinet and you're unsure, stop and call a qualified technician.

Step-by-step fix

1Reset the washerUnplug the machine for a few minutes, then restore power and restart the cycle to clear a temporary glitch.
2Inspect the pressure hoseAccess the sensor (usually mounted high inside the cabinet), detach the thin hose from the tub, rinse it, blow it clear, and check for splits or kinks before reattaching.
3Check the connectionsReseat the sensor's wiring connector and look for corrosion or loose pins.
4Test the sensorA technician can measure the sensor's resistance against the service-manual spec to confirm whether it reads correctly.
5Replace the sensorIf the hose and wiring are good but readings are wrong, replace the water level pressure sensor.
6Service the boardIf the sensor and hose are confirmed good, the main control board may need inspection or replacement by a professional.

Still showing PE?

If you’ve worked through every step and PE keeps returning, an internal part likely needs testing and replacement. That’s a job for a qualified appliance technician, who can measure the suspect part against the service-manual spec before replacing it.

Which models this applies to

LG washing machines. Both LG front-load and top-load washers.

FAQ

What does LG PE mean?

Water level pressure sensor fault. PE means the control board is getting an incorrect or implausible water-level signal from the pressure sensor. The machine can't reliably tell how much water is in the tub, so it halts.

What causes LG PE?

The most likely cause is pressure sensor hose loose, kinked, cracked, or clogged with residue. Other causes include Faulty or drifting water level pressure sensor; Loose or corroded wiring between the sensor and control board; Main control board fault (less common).

Can I fix LG PE myself?

Some checks are DIY, but this code often points to an internal component, so it may need a qualified technician.