GE Dishwasher Error Code AUTO & SPEED flash

When the AUTO and SPEED lights flash at the same time on a GE dishwasher, it indicates a turbidity sensor fault. The turbidity sensor monitors water clarity so the Auto cycle can adjust itself based on soil level. When the sensor cannot produce a reliable reading, the control board flags the error and assumes the water is heavily soiled as a precaution. The most common causes include dirty filters, sensor contamination, drain problems, or a wiring issue.

The dishwasher will continue to operate in a high-turbidity default mode, meaning it will run longer and more aggressively than necessary, which wastes water and energy. There is no immediate safety hazard, but running the machine in this state long-term can increase wear. It is best to diagnose and correct the fault before continuing regular use.

If the fix is as simple as cleaning the filters and sensor, there is no parts cost involved. A replacement turbidity sensor typically costs somewhere in the range of $20 to $60 in parts depending on the model. If you hire a technician for the diagnosis and repair, total costs including labor generally fall in the range of $100 to $200, though this varies by region and service provider.

Many cases of this fault can be resolved without professional help. Start by cleaning the filters thoroughly, then locate and inspect the turbidity sensor for grease or mineral buildup and clean the lens carefully. Also check that the drain hose and pump are clear of obstructions. If cleaning all components does not clear the code, the sensor or wiring may need replacement, which is still a manageable DIY repair for someone comfortable working inside a dishwasher.

A reset may temporarily clear the fault display, but the code will return if the underlying cause is not addressed. The turbidity sensor fault is triggered by a real condition such as a dirty sensor, clogged filter, or wiring problem. Resetting the control board does not fix any of those issues, so the error will reappear once the Auto program runs again and encounters the same sensor problem.