Bosch Dishwasher Error Code Turbidity Sensor High Signal

This error means the turbidity sensor, which monitors how dirty the wash water is, reported a count greater than 65,279 within a 0.4-second interval. That reading is far beyond the normal operating range and indicates a sensor fault, contamination of the sensor lens, or a wiring problem in the sensor circuit. The dishwasher flags this condition to prevent the wash cycle from running on corrupted water quality data.

A reset may temporarily clear the error code, but it will return if the underlying hardware fault is still present. The error is triggered by an out-of-range sensor reading, so until the sensor, wiring, or control board issue is corrected, the code will reappear when the dishwasher attempts to run a cycle.

If only the turbidity sensor needs to be replaced, parts and labor typically range from around $80 to $200 depending on the model and local labor rates. If the fault is traced to the control board, repair costs can be higher, generally ranging from $200 to $400 or more. Getting a diagnostic from a qualified technician first can help narrow down the exact component before committing to a repair cost.

In some cases, yes. If the turbidity sensor lens is coated with grease or mineral deposits, carefully cleaning it may resolve the error. However, if the sensor itself has failed or there is a wiring fault, replacing the sensor or repairing the wiring will be necessary. A multimeter can help you check the wiring for continuity before ordering parts.

It is not recommended to continue running the dishwasher with this error active. The turbidity sensor guides wash cycle decisions, and operating without valid sensor data can result in poor cleaning performance. Continuing to run cycles with an unresolved sensor fault could also mask other developing issues.