Editorial & technical review
- Written by ApplianceWorth Editorial Team
- Technically reviewed by Victor — appliance technician
- Last reviewed 2026-07-01
- Applies to Bosch dishwashers
- Confidence medium
- Sources Manufacturer service documentation and field-repair experience · Methodology · Report a correction
What this code means
The AquaSensor could not calibrate or is not reporting water clarity normally. The dishwasher may still run, but cycle length and water use can change.
Most likely causes
- The AquaSensor lens or water path is dirty
- The sensor did not calibrate during the service check
- A loose sensor connector or damaged harness
- The AquaSensor or control input has failed
Safe checks for the owner
- Clean the filters and run a normal cleaning cycle with an approved dishwasher cleaner.
- Avoid excessive detergent and confirm that the water is not heavily foaming.
- If wash results remain acceptable, note that the dishwasher may simply run longer until repaired.
Estimated U.S. repair cost
$180–$480, depending on model, access, parts availability and local labor.