Ford P0591 OBD-II Trouble Code Definition: P0591 Speed Control Multiplexed Switch Performance P0591 Ford OBD-II Trouble CodeDescription: OBD Trouble Code P0591 Cruise Control Multi-Function Input “B” Circuit Range/Performance What does the code mean? OBD-ii Code P0591 definition: Symptoms Sumptoms of OBD code P0591 – Engine Light ON (or Service Engine Soon Warning Light) Causes Causes of […]