Bosch Dishwasher Error Code dr:08

The dr:08 code means the control board has detected a failure in the motor speed sensor. This sensor monitors impeller rotation and provides feedback to ensure the wash motor is running correctly. When the sensor signal is absent or invalid, the dishwasher stops the cycle and displays this fault. Diagnosis starts with inspecting the sensor and its wire harness and running Bosch test procedure P4.

The dishwasher will typically halt the wash cycle when this fault is active, so continued normal use is not possible until the fault is resolved. Attempting to force cycles while the fault is present could stress the motor if the underlying cause is a motor issue rather than just a sensor or wiring fault. It is best to address the repair before resuming regular use.

A reset may temporarily clear the code from the display, but if the underlying fault in the speed sensor or wiring is still present, the code will return once the machine attempts to run again. Resetting does not repair the sensor or harness. A proper repair addressing the root cause is required for the code to stay cleared.

A knowledgeable DIYer can inspect the wire harness and connectors for visible damage or corrosion without special tools. However, accessing the motor speed sensor typically requires pulling the dishwasher out and partially disassembling the pump area, which takes mechanical confidence. Running the P4 diagnostic test also requires familiarity with Bosch service procedures. If the sensor or motor assembly needs replacement, having a technician perform the repair is advisable.

Repair costs depend on which component has failed. If only the wiring harness or connector needs attention, costs may be relatively low, primarily covering labor. A replacement speed sensor or motor assembly adds parts costs on top of labor, with total repair estimates generally ranging from $150 to $400 or more depending on the specific parts required and local labor rates.