pE2
LG Washing Machine
Severity: ModerateWhat Does This Error Mean?
The pE2 error means your LG washer's water pressure sensor is not working correctly. This sensor tells the machine how much water is in the drum. Without an accurate reading, the washer cannot control the fill level safely.
Affected Models
- WM3900HWA
- WM4000HWA
- WM3500CW
- WT7300CW
- Most LG front-load and top-load washers
Common Causes
- Faulty water level pressure sensor that has failed or drifted out of calibration
- Blocked or kinked pressure sensor hose preventing accurate air pressure readings
- Air leak in the pressure sensor hose causing false water level readings
- Wiring connector loose or corroded between the sensor and the control board
- Main control board unable to process the sensor signal correctly
How to Fix It
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Unplug the washer for 10 minutes, then plug back in.
A hard reset clears temporary sensor faults. This resolves the error in some cases.
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Check if the washer is level on the floor.
An unlevel washer can affect water level readings. Place a spirit level on top and adjust the leveling feet if needed.
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Do not overfill the washer — load it to the recommended capacity.
Overloading can stress the pressure sensing system. Remove some items if the drum is packed full.
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Run a Tub Clean cycle to remove any detergent buildup.
Excessive suds can affect the pressure sensor hose readings. Using the right amount of HE detergent prevents this.
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If pE2 persists, schedule a technician to inspect the pressure sensor and its connecting hose.
The technician will check for kinks, cracks, or blockages in the hose, and test the sensor with diagnostic tools.
When to Call a Professional
If cleaning and resetting do not clear pE2, the pressure sensor or its hose will need inspection. A technician can test and replace these parts in under an hour. Contact LG support or an appliance repair service. Expect costs of $80–$200.
Frequently Asked Questions
What is the difference between pE and pE2 on LG washers?
The pE code is the general pressure sensor error. The pE2 code indicates a more specific fault — typically a sensor that has failed its self-test or is reading out of range. Both point to the same component, but pE2 usually means the fault is more persistent.
Can using too much detergent cause the pE2 error?
Yes, indirectly. Excess suds can block or partially block the pressure sensor hose. Always use HE (High Efficiency) detergent in LG washers and use the correct amount for the load size.
Is the pE2 error safe to ignore temporarily?
Not really — without a working pressure sensor, the washer cannot regulate water levels accurately. This could lead to underfilling, overfilling, or even flooding. Avoid running the machine until the fault is resolved.