GE Dishwasher Error Code Turbidity Sensor No Signal

This error means the control board is not receiving any pulse signals from the turbidity sensor, which is the optical component that monitors water clarity during the wash cycle. The sensor uses an LED and a light receiver to track how dirty the water is and adjusts the wash accordingly. When the pulse counter reads zero, the control board flags the error to indicate the sensor system has stopped communicating. The cause is typically a dirty sensor lens, a failed LED or receiver, or a wiring connection problem.

A reset may temporarily clear the error code from the display, but it will return if the underlying problem is not fixed. The control board will check the turbidity sensor again as soon as the next wash cycle begins, and if pulses are still absent, the error will reappear. Address the root cause first before relying on a reset.

If the fix is simply cleaning the sensor lens or reseating a wiring connector, the cost is minimal, covering only your time. If the turbidity sensor assembly needs to be replaced, parts typically range from $20 to $60 depending on the specific model. Professional labor to diagnose and replace the sensor would add roughly $100 to $200 to that total, depending on your local service rates.

In many cases, yes. Start by locating the turbidity sensor, which is typically mounted in the sump area of the dishwasher tub, and cleaning the optical lens thoroughly to remove grease or scale. Also check that all wiring connectors to the sensor are fully seated and free of corrosion. If cleaning and reseating connections do not resolve the error, the sensor assembly itself likely needs to be replaced, which is a moderate DIY repair involving accessing the sump area.

The dishwasher may still run cycles while this error is present, but it cannot properly adjust wash performance without turbidity sensor feedback. This could result in dishes being washed with suboptimal water conditions, either under-washing or wasting water and energy. It is best to diagnose and resolve the error promptly rather than running repeated cycles in a degraded state.