LG Dishwasher Error Code PE — Explained & Fixed

⚠️ Error Snapshot

• Brand: LG

• Error Code: PE

• Meaning: Water level sensor (pressure sensor) error

• Severity: Medium

• DIY Fix Possible: Yes (in many cases)

💡 What Does the PE Error Mean?

The PE error code indicates that your dishwasher is having trouble detecting the correct water level.

This usually points to a problem with the pressure sensor or its connection, which tells the machine how much water is inside.

🚨 Common Signs

• Dishwasher stops mid-cycle

• Water fills incorrectly (too much or too little)

• Cycle won’t start properly

• Error shows immediately after turning on

🔍 Root Causes

1. 🧠 Faulty Pressure Sensor

• Sensor may be damaged or worn out

• Sends incorrect water level readings

2. 🧵 Wiring or Connection Issues

• Loose or damaged wires connected to the sensor

3. 💧 Blocked Air Chamber or Hose

• Dirt or grease blocking pressure tube

• Prevents accurate readings

4. ⚡ Control Board Glitch

• Temporary electronic malfunction

🛠️ Quick Fix (Try First)

✔️ Turn off the dishwasher and unplug it
✔️ Wait 10 minutes for a reset
✔️ Restart and check if error disappears

🔧 Step-by-Step Troubleshooting

Step 1: Perform a Reset

• Power off the unit

• Leave it unplugged for 10 minutes

• Turn it back on

Step 2: Check Water Supply

• Ensure steady water flow

• Confirm inlet valve is working properly

Step 3: Inspect Pressure Sensor Hose

• Locate the thin hose connected to the sensor

• Check for clogs or bends

• Clean if necessary

Step 4: Examine Wiring

• Look for loose or damaged connections

• Secure any disconnected wires

Step 5: Replace Pressure Sensor (if needed)

• If problem persists, sensor may need replacement

🧯 When to Call a Technician

• Error keeps returning after reset

• Sensor replacement doesn’t fix the issue

• You suspect control board failure

🛡️ Prevention Tips

• Clean dishwasher regularly

• Avoid grease buildup

• Use proper detergent

• Run maintenance cycles monthly

💡 Final Take

The LG PE error code is mainly a sensor-related issue, not a major mechanical failure. In many cases, a simple reset or cleaning of the pressure hose solves it.

If ignored, though, it can affect washing performance and lead to bigger issues—so it’s worth fixing early.