Ford P0483 OBD-II Trouble Code Definition: P0483 Cooling Fan Rationality Check Malfunction P0483 Ford OBD-II Trouble CodeDescription: OBD Trouble Code P0483 Fan Rationality Check What does the code mean? OBD-ii Code P0483 definition: The electric cooling fan is controlled by the powertrain control module (PCM) through the cooling fan relay based on inputs from the following […]