Check error codes yourself so that you aren’t tricked into paying for extra repairs by a dishonest mechanic.Ĭons Expensive Low battery life (compared to corded models).

Confirm the mileage on a used car before purchase.Perform home emissions checks before a state inspection.Diagnose and perform minor maintenance on your own vehicle.There are several reasons you may want an OBD2 scan tool, even if you aren’t a professional mechanic: So one problem with a Ford could read differently on a Toyota or Honda. Although many universal code definitions exist, some vary by manufacturer. Some of the best OBD2 scanners may even link to a repair database that offers guidance and advice. Most modern OBD2 scan tools will translate error codes for you so that you don’t need to look them up yourself.

When your car’s computer registers an error, it will activate the check engine light, but an OBD2 scanner is needed to learn the specific issue.Ī basic OBD2 scan tool will display an error code that you’ll then need to look up in an owner’s manual or online.

OBD2 devices, also known as OBDII scanners, work by plugging into a 16-pin connector typically found under the steering wheel column.ĭeveloped by the California Air Resources Board (CARB), an OBD2 scanner interacts with your car’s computer to read error codes, perform emissions tests, and monitor specific data like engine temperature. OBD2 scanner ports became standard on all domestic vehicles in 1996 after the federal government pushed to reduce vehicle emissions.

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