Viking Dishwasher Error Code Motor Control Communication Error

This error means the main control board and the motor controller module have lost communication with each other. The dishwasher relies on a continuous data link between these two components to operate the wash and drain pumps correctly. When that link fails, the appliance halts the cycle and displays this fault. The cause can range from a loose wiring connector to a failed control module.

A reset may temporarily clear the error code, but if the underlying wiring or component problem has not been fixed, the error will return as soon as the dishwasher attempts to run a cycle. Resetting is a reasonable first step to confirm the fault is active, but it is not a substitute for diagnosing and correcting the root cause.

Repair costs vary depending on the failed component. If the issue is just a loose or corroded connector, the cost may be limited to a service call fee, typically in the range of $75 to $150. Replacing a motor controller or main control board involves additional parts costs, with total repair bills for component replacement commonly falling in the range of $200 to $600 or more depending on parts pricing and labor rates in your area.

The first step is checking and reseating the wiring harness connectors between the motor controller and the main control board, which is a task many homeowners can handle safely with the dishwasher unplugged. If the connectors look clean and secure, diagnosing a failed control board or motor controller is more involved and generally requires a technician with the proper tools to test components and identify which module has failed.

The dishwasher will typically not complete a wash cycle when this fault is active, so normal use is not possible. The appliance shuts down as a protective measure. You should leave the dishwasher off and investigate the fault before attempting to run additional cycles, as operating with a communication fault can mask other issues developing in the motor circuit.