Why does the Power door lock work on one side only?

If the power door lock works on one side only, it could be due to a faulty switch, wiring issues, or a malfunctioning actuator on the affected side. The switch may not be sending the signal properly, or there could be a break in the wiring that connects to the door lock system. Additionally, the actuator, which is responsible for locking and unlocking the door, may be defective. Diagnosing the exact cause typically requires inspecting these components.