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Error code reference

GE Dishwasher Error Code Turbidity Sensor High Signal

Turbidity sensor count is greater than 65,279 in 0.4 seconds.

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Turbidity sensor count is greater than 65,279 in 0.4 seconds.

First step from the service manual

Check turbidity sensor and wiring connections.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What Turbidity Sensor High Signal means on a GE dishwasher

The Turbidity Sensor High Signal error on a GE dishwasher indicates that the turbidity sensor is returning a count greater than 65,279 within a 0.4-second measurement window. The turbidity sensor is an optical component that measures water clarity by detecting how much light passes through the wash water. The control board uses this data to determine soil levels and adjust cycle parameters accordingly. A count that exceeds the upper threshold of 65,279 in such a short interval points to a signal anomaly rather than simply dirty water.

This type of out-of-range reading most commonly results from a faulty turbidity sensor that is generating an erroneous electrical signal, contamination on the sensor lens that is blocking the optical path entirely, or a wiring issue causing a short or incorrect voltage to reach the control board. Debris, grease buildup, or a cracked sensor housing can all interfere with normal light transmission and push the sensor count into an invalid range. The control board interprets any count above 65,279 as a hardware fault rather than a legitimate soil level reading.

The first diagnostic step is to inspect the turbidity sensor and its wiring connections. Check for loose connectors, damaged wiring insulation, and any visible contamination on the sensor lens. Cleaning the sensor lens and reseating wiring harness connections resolves the fault in some cases. If the sensor itself is producing an out-of-range signal even after cleaning and reconnection, the sensor likely requires replacement. Always verify that the wiring between the sensor and control board shows no signs of pinching, chafing, or corrosion before condemning the sensor.

Source: manufacturer service documentation.

Common causes of Turbidity Sensor High Signal

  1. 01

    Contaminated or fouled sensor lens

    Wiring / connection

    Grease, hard water deposits, or food debris coating the turbidity sensor lens can block its optical path and cause an extreme out-of-range signal. Inspect the sensor lens visually and clean it carefully if buildup is present.

  2. 02

    Faulty turbidity sensor

    Part replacement

    A sensor that has failed internally may output a signal count exceeding 65,279 regardless of water conditions. If cleaning and reconnecting the sensor does not resolve the fault, the sensor itself likely needs replacement.

  3. 03

    Loose or damaged wiring connections

    Wiring / connection

    A loose connector or chafed wire between the turbidity sensor and the control board can introduce erroneous voltage readings that push the sensor count out of range. Inspect the wiring harness for corrosion, pinching, or disconnected terminals.

  4. 04

    Short circuit in the sensor circuit

    Wiring / connection

    A wiring short can cause the control board to receive a falsely elevated signal from the turbidity sensor circuit. Check for any wires contacting the dishwasher chassis or each other along the sensor harness route.

  5. 05

    Failed control board

    Part replacement

    In rare cases, the control board may misinterpret or fail to process the turbidity sensor signal correctly even when the sensor and wiring are intact. This is typically only considered after the sensor and all wiring connections have been confirmed good.

See the test procedure for each cause

Frequently asked questions about Turbidity Sensor High Signal

What does Turbidity Sensor High Signal mean on a GE dishwasher?
This error means the turbidity sensor, which monitors how dirty the wash water is, has returned a count greater than 65,279 within a 0.4-second window. That reading is beyond the valid measurement range and indicates a sensor fault rather than an actual water condition. The dishwasher triggers this code to alert you that the sensor circuit needs inspection before normal operation can continue.
Can I fix the Turbidity Sensor High Signal error myself?
Many cases can be resolved without professional help by cleaning the turbidity sensor lens and reseating the wiring harness connectors. If those steps do not clear the fault, replacing the turbidity sensor is a repair many experienced DIYers can handle with basic tools. If the wiring or control board is involved, a technician may be needed for accurate diagnosis.
Is it safe to use my GE dishwasher while this error is active?
Running the dishwasher with an active turbidity sensor fault is not recommended. The control board relies on sensor data to manage cycle timing and water usage, and an invalid sensor reading means the appliance cannot regulate the wash cycle correctly. Continuing to operate it could result in poor cleaning performance or unintended cycle behavior.
How much does it cost to repair a Turbidity Sensor High Signal error on a GE dishwasher?
If only the turbidity sensor needs replacement, parts typically range from $20 to $60 depending on the model, with professional labor adding $75 to $150 or more. If the issue is a wiring repair, costs are generally on the lower end. Control board replacement, if required, is significantly more expensive and can range from $150 to $400 or more for parts alone.
Will resetting my GE dishwasher clear the Turbidity Sensor High Signal error?
A reset may temporarily clear the error code, but if the underlying cause such as a contaminated sensor, damaged wire, or faulty sensor component is not addressed, the fault will return. It is best to inspect and resolve the sensor or wiring issue before relying on a reset as a solution.

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