LG Washer PE Error Code: Meaning, Causes & Fix

Pressure (water level) sensor error — the level sensor is faulty or its signal is implausible.

PE reports a fault in the pressure switch/level sensor system: the control cannot get a believable water-level reading. The sensor reads tub pressure through a thin air hose; the hose (blocked, waterlogged, split, or off) is statistically the fault more often than the sensor itself. Without a level, the washer can't fill, wash or drain safely, so it stops. PE is usefully read alongside its neighbour FE, because LG documents the two as reports from one instrument. The water level sensor does not measure water directly; it reads air pressure in a thin hose as the tub fills, and everything PE and FE describe is that reading failing in one direction or another — unmeasurable for PE, implausibly high for FE. LG's own text connects the failure modes: a clogged sensor hose corrupts detection, excessive suds fool the sensor, and humid air around the machine can upset it outright. Holding that picture prevents the common mistake of treating PE as a verdict on one replaceable part. The sensor is the last element of a small system — hose, air dome, connections, control input — and LG's owner guidance, a reset followed by service if it persists, is calibrated to exactly that: the system needs hands-on separation, and no single component should be bought on the code alone.

What causes the PE code on a LG washer?

Air hose compromised

Water inside it, a split, a kink, or the hose popped off its nipple.

Level sensor failure

Output stuck or out of range.

Connector corrosion at the sensor

It lives high in the cabinet where condensation collects.

Suds intrusion

Foam in the hose holds a false reading for cycles.

A humid installation environment confusing the sensor

This is the cause LG itself puts first for PE, and most owners have never heard it: both LG's WashTower guide and its top-load error list warn that PE may occur due to moisture in the air when the washer is installed in a humid room such as a bathroom. Condensation around the level sensor and its connections corrupts the reading the control depends on. A PE that clusters in steamy weather, or in a washer that lives in a steamy room with the door kept shut, fits LG's environmental branch — and its remedy starts with the reset below and better ventilation, not with parts.

A clogged sensor hose feeding the level system false information

LG's WashTower guide describes the neighbouring FE overfill error as occurring when the hose connected to the water level sensor is clogged, leading to incorrect water level detection — and PE is the same level-sensing system reporting from the other side of its range. The thin air hose between tub and sensor is the shared component: water, suds residue or debris inside it distorts the pressure signal for both codes. A washer that alternates between PE and fill-level oddities is telling one hose story with two displays.

Excessive suds overwhelming level detection

The same WashTower guidance ties level-sensor malfunction during overfill directly to excessive suds from too much detergent or the wrong type, noting that liquid and eco detergents suds more than front-load powders. Foam pressing into the sensor hose holds a false pressure long after the tub itself has drained, so a PE that follows heavily dosed or non-HE loads — especially loads you could see foam on — should be treated as a detergent event first. The machine often recovers completely once the foam fully clears and the hose dries back to air.

Checks to run before you replace anything

1. Find the sensor (top of cabinet; thin hose down to the tub) and inspect the hose end-to-end.
2. Check the hose interior is dry; refit it firmly at both ends.
3. Reseat the sensor connector; look for green corrosion.
4. Do LG's reset exactly as its guides prescribe before opening anything: unplug the power cord, wait a full five minutes, reconnect and start the unit. LG gives this same five-minute procedure in both its WashTower guide and its top-load error list for PE, and frames what follows clearly — if the PE error continues to appear, request service. One reset, honestly judged, is LG's whole owner-level test for this code.
5. Establish which machine you actually have before following any PE advice: LG's top-load error list includes PE explicitly as its pressure sensor error, and its WashTower guide covers the front-load platform, so PE is documented on both — but the sensor and hose sit in different places and the access differs, which is why the top-load-specific searches exist. Your model number, not the code, decides which layout you are looking at.
6. Reconstruct the load and the room before condemning the sensor: was the faulting load washed with an extra-large or non-HE dose, was foam visible at the door, and is the washer installed somewhere humid with poor ventilation? Affirmative answers route you to LG's suds and moisture branches — run an empty rinse, air the room, retest on a plain load — before the code earns a service call.
7. Note the point in the cycle where PE appears and whether water is visibly present at a sane level: PE at start-up with an empty tub, PE mid-fill with water rising normally, and PE alongside an obviously overfilled tub are three different reports from the level system, and a technician quoted the right one starts several steps ahead.

How to fix lg washer error code pe?

1. Clear/replace the air hose with correct routing (no low loops that trap water).
2. Replace the level sensor if hose and connector are sound and PE persists.
3. Cleaning cycle first if the machine is heavily sudsed/build-up laden.
4. After the five-minute LG reset, prove the cure with an ordinary mid-size load on a correct HE dose rather than with the same load that faulted: if PE was a moisture or suds event, a clean test load completes and the code stays away; if PE reappears on that honest test, follow LG's direction and request service instead of resetting repeatedly.
5. Attack the environment if your washer lives in humidity: ventilate the room, leave the washer door and dispenser drawer ajar between washes so the cabinet interior dries, and keep the machine out of direct steam where the layout allows. LG raises the humid-room cause in two separate guides, which makes drying the machine's surroundings a legitimate fix for PE rather than a superstition.
6. Correct the detergent story permanently if suds were involved: HE detergent only, dosed for the load rather than by habit, with liquid and eco products measured especially carefully because LG notes they suds more readily in front-loaders. Run an empty hot maintenance cycle to clear residue from the tub and the sensor hose's air dome before judging whether PE has truly gone.
7. Leave the sensor and its hose replacement to service when the reset and the environmental fixes fail: LG's guides end PE at 'request service', and the level system is a safety input — a washer that cannot trust its water level should not be persuaded to run with the sensor bypassed, jumpered or guessed at.

The part that usually fails: Water level (pressure) sensor + air hose

Hose first (free), connector second (free), sensor third (inexpensive) — the elimination order that avoids wasted parts.

How to reset lg washing machine error code pe?

Power-cycle 5 minutes after the fix; PE clears when a plausible level registers at fill.

LG's standard reset is a power cycle: press Power off, unplug the washer for about 5 minutes, then — with the machine still unplugged — press and hold the Start/Pause button for 5 seconds to drain residual charge from the board. Plug back in and run a test cycle. There is no hidden reset button on LG washers; any code that reappears after this procedure is an active fault the control is still detecting, not a glitch that needs a deeper reset.

Why does the PE code keep coming back?

PE returning after a sensor swap usually means the hose routing re-traps water, or board-side connector corrosion remains. The way PE returns identifies its branch more reliably than any single test. PE that appears after steamy weather or in a persistently humid room, and clears for weeks after the five-minute reset, is LG's environmental case managing itself — improve ventilation and drying habits and the interval usually stretches. PE that follows particular loads — big doses, non-HE products, visible foam — is the suds-and-hose case, and it ends when dosing is corrected and residue is cleaned out, not when the sensor is changed. PE that returns promptly on plain loads in a dry room, resetting cleanly only to fault again at the same cycle point, has left both of LG's owner branches behind: that is the sensor, hose or control hardware asking for the service visit LG prescribes, and arriving with the pattern documented makes that visit decisive.

How to stop PE coming back

• Air hose compromised: Water inside it, a split, a kink, or the hose popped off its nipple.
• Level sensor failure: Output stuck or out of range.
• Connector corrosion at the sensor: It lives high in the cabinet where condensation collects.

Retrieving stored fault codes on LG washers

LG front-loaders have a test mode used by technicians: with the machine off, a specific three-button combination (commonly Soil Level + Spin Speed + Power held in sequence on many models, and a button-pair hold on others) steps the machine through fill, wash, drain, spin and heater tests while the display shows stored error history. The exact combination differs by model year, so technicians read it from the service manual for the model; if you enter a mode where the tub starts filling or the motor jogs, that is the test mode working — press Power twice to exit.

Other LG washer error codes

See the full list on the LG Washer error codes hub.

Codes PE gets confused with

FE — Overflow error — the water level is too high (LG's manuals: 'Water level is too high due to a faulty water valve'; LG's top-load list: the washer has detected an overfilled tub). FE is LG's overfill code, the mirror of IE: too much water has been supplied to the tub.

AE — Two different LG faults share this code, by platform. On LG top-load washers AE is a rotation error: the gears responsible for rotating the drum cannot operate properly. On LG front-load washers (global/EU manuals) AE is a water leakage error: water leaks — call for service. AE is the LG washer code where reading a single meaning off the internet does real damage, because LG itself publishes two.

IE — Inlet error — the washer is not filling with water properly (Water Inlet Error). IE (also read as 1E on segmented displays — they are the same code) means the control called for water and the level did not rise as expected.

tE — Temperature sensor error — LG's front-load manuals head this code 'Temperature Sensor Error' and give its cause, in one word pair, as a control error; LG's top-load list describes a problem with the temperature sensor inside the tub. tE is the code LG's documentation treats most tersely, and this page follows LG rather than the internet's expanded version of it.

Working from a symptom instead? Read our troubleshooting guide for this problem.

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Facts on this page were checked against manufacturer documentation: www.lg.com · www.lg.com · lg.com · www.lg.com