KitchenAid Dishwasher Error Code Anti-Bacterial/Heavy + Normal Wash + China Gentle + Quick Rinse

This combination of four cycle indicator lights illuminating at the same time is a fault code indicating that the turbidity sensor failed to complete its calibration routine. The turbidity sensor measures how dirty the wash water is by using an infrared optical signal. When the control board cannot get a valid baseline reading from the sensor at the start of a cycle, it stops operation and displays this multi-light code. The issue can stem from a dirty sensor lens, a wiring fault, or a failed sensor component.

A reset may temporarily clear the fault lights, but if the underlying cause has not been addressed, the code will return when the next cycle attempts to run and the sensor fails calibration again. Resetting is useful for confirming whether the fault is intermittent, but it is not a fix for a fouled or failed turbidity sensor. Address the root cause before relying on a reset to restore normal operation.

If only cleaning is needed, the repair can cost little to nothing beyond your time. A replacement turbidity sensor typically costs in the range of $20 to $60 for the part, depending on the specific model. If a professional technician is needed for diagnosis and replacement, total repair costs including labor generally range from $100 to $250. Control board replacement, if required, is a more expensive repair that can range from $200 to $400 or more.

In some cases, yes. Start by cleaning the turbidity sensor lens at the bottom of the dishwasher tub, as grease and scale buildup is the most common cause of this fault. Also clear any debris from the tub floor and filter area that could be blocking the sensor. If cleaning does not resolve the fault, further diagnosis of the wiring harness and the sensor itself will likely require a multimeter and some comfort working with appliance components.

The dishwasher is designed to stop operation when this fault is detected, so it will generally not complete a wash cycle in this condition. Attempting to force cycles while the sensor fault is unresolved could result in poorly cleaned dishes since the machine cannot accurately monitor water clarity. It is best to diagnose and resolve the fault before returning the appliance to regular use.