These OBD-II scanners are hooked as much as the connector on the automobile. These connectors are usually beneath the dash or perhaps close towards the ashtray in most cars. The OBD-II scanners have a plug that is definitely place into the connector and is then attached to an AutoTap launch x431 gx3 price. The scanner is in a position to decide poisons coming from the automobile too as decode any engine troubles. The OBD-II scanners could also be within a position to clear old codes, depending on the unit that is bought.