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ErrBase

LG Dishwasher 6E Error Code: Turbidity Sensor Fault

Quick Answer

6E on an LG dishwasher means the turbidity sensor has faulted. This sensor measures how dirty the wash water is and allows the dishwasher to adjust cycle length accordingly. On LG models, the turbidity sensor is commonly fouled by grease or hard water scale building up on its optical window.

6E on an LG dishwasher means the turbidity sensor has faulted. This sensor measures how dirty the wash water is and allows the dishwasher to adjust cycle length accordingly. On LG models, the turbidity sensor is commonly fouled by grease or hard water scale building up on its optical window. Cleaning the sensor window is the first step and resolves 6E in many cases without replacement.

LgDishwasherSeverity: moderateDifficulty: intermediate82% DIY Success
Time to Fix
20–45 min
Difficulty
intermediate
Parts Cost
$20 – $35
Tools Needed
Flathead screwdriver, Soft cloth

What Does the 6E Code Mean?

6E is a turbidity sensor fault. Clean the optical sensor window first -- grease or scale fouling is the most common cause. If cleaning does not resolve it, replace sensor 5221DD1001A.

Most Likely Causes

Based on aggregated repair data, here is the probability breakdown for this error code:

Grease or hard water scale fouling the optical sensor window40%
Turbidity sensor component failure36%
Turbidity sensor wiring connector loose or corroded24%

Symptoms You May Notice

  • 6E displayed during wash cycle
  • Cycle may run on maximum time regardless of dish load
  • 6E clears after cleaning sensor in some cases

Can you reset a Lg dishwasher to clear the 6E code?

After cleaning the sensor or replacing it, unplug for 60 seconds and restart. Run a normal wash cycle to confirm 6E does not return.

Tools Required for Diagnosis

Flathead screwdriverSoft clothWhite vinegar

Diagnostic Checklist

Follow these steps in order. We start with the easiest external fixes before opening up the machine.

1

Disconnect power

Disconnect power. Locate the turbidity sensor on the lower tub interior or inside the sump area -- it has a small clear optical window. Using a soft cloth slightly dampened with white vinegar, gently clean the optical window surface. Allow to dry before restoring power.

2

If cleaning does not resolve 6E

Replacement Parts

If your diagnostic testing proves the component has failed, you will need a replacement. We recommend OEM parts over aftermarket for water-handling components.

Part Name
Turbidity Sensor5221DD1001A · $20–$35

Repair vs. Replace Calculator

Appliance Age (Years)7 Yrs
Labor Approach
Our Verdict
REPAIR
Estimated Cost: $28 (Parts) vs $700 (New Machine)

Frequently Asked Questions

What does the turbidity sensor do in an LG dishwasher?
The turbidity sensor measures water clarity using an optical transmitter and receiver. The control board uses this data to extend or shorten the cycle. A fouled sensor means the board cannot make this judgment and either faults or defaults to maximum cycle time.

Related Lg Dishwasher Error Codes

Code: HELG Dishwasher HE Error Code: Heater FaultCode: E1LG Dishwasher E1 Error Code: Temperature Sensor FaultCode: OELG Dishwasher OE Error Code: Drain Fault

Same Fix Works on These Brands

Lg shares the same hardware platform with these brands. The diagnosis and repair steps are identical.

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Models Known to Experience 6E Errors

This repair applies to most Lg dishwashers with this error code. Common model numbers include:

LDFN4542D, LDF5545ST, LDFS5788S, LDP6763ST, LDFN3432T, LDFN4542S, LDFN4542W

Last verified for technical accuracy on March 14, 2026