Quick answer
Stop after checking for obvious water-level or leak symptoms; PE normally needs service inspection.
Safety note
Disconnect power before opening panels or touching wiring. If water is leaking near electricity, stop and call a qualified technician.
Related problem hub
See more sensor reading fault appliance codes across other brands and appliance types.
What PE means
On many LG dishwasher models, PE belongs to the sensor reading fault category. A sensor value is outside the range expected by the control board.
Codes and exact steps can vary by model number, production year, and regional design. Use this guide as first-pass orientation and confirm model-specific details with the manufacturer source listed below.
Before you start
Write down the full model number and the exact display text before changing parts or clearing the control. Similar-looking codes can map to different model families, and a reset can erase useful timing clues.
If the appliance shows active leaking, a burning smell, smoke, gas odor, repeated breaker trips, or water near power, stop this checklist and use qualified service.
Common causes
- Temporary sensor reading glitch
- Dirty sensor surface
- Loose sensor wiring
- Failed thermistor, pressure sensor, or humidity sensor
Recommended check order
- Confirm the model number and exact code spelling.
- Disconnect power for 5 minutes to clear a temporary control state.
- Clean accessible sensor surfaces shown in the manual.
- Avoid spraying cleaner into control panels or sensor openings.
- Run a short test cycle after the reset.
- Run one controlled reset only when the appliance is dry, stable, and safe.
- Stop if PE returns immediately or appears on an empty test.
Safe checks before service
- Disconnect power for 5 minutes to clear a temporary control state.
- Clean accessible sensor surfaces shown in the manual.
- Avoid spraying cleaner into control panels or sensor openings.
- Run a short test cycle after the reset.
What not to do
- Do not bypass locks, sensors, fuses, or leak protection to force a cycle.
- Do not open powered panels or touch wiring for a code check.
- Do not assume one display code proves one specific part has failed.
Stop and call a technician when
- The code returns immediately.
- The appliance cannot complete a short empty cycle.
- The suspected sensor is inside a sealed or powered area.
FAQ
Is PE always a broken part?
No. On a LG dishwasher, PE usually identifies a sensor reading fault category. A blocked hose, dirty filter, uneven load, or unsafe operating condition can trigger a code before a part failure is confirmed.
Can I reset PE?
A single power reset can be reasonable after visible checks are complete and the appliance is safe. If PE returns immediately, treat it as an active fault rather than a nuisance message.
Why does model number matter?
Brands reuse similar code text across model families. The model number controls the exact manual steps, access points, and service boundary.
Aliases and related display text
People may search for this same condition using different capitalization or alternate display forms.
- PE