Could a faulty DLC (Data Link Connector) cause Scangear error 255 0 0?

Yes, a faulty DLC (Data Link Connector), often referred to as the OBD-II port, is a common cause for Scangear error code 255 0 0. The DLC transmits data between the vehicle's computer and the scan tool. If the connector is damaged, corroded, or has loose pins, communication can be disrupted, leading to this error. Inspect the DLC for any physical damage or corrosion and consider cleaning the pins with electrical contact cleaner.