![]() Read fault codes yourself to determine the urgency of a check engine lightĪ low-cost, reliable OBD2 scanner can be purchased for $20 to $40.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.You may want an OBD2 scan tool for several reasons, even if you aren’t a professional mechanic. These tools will display engine fault codes, the necessary starting point for diagnosing most modern automotive malfunctions. When a check engine light comes on, an OBD2 reader can help you get a general description of the issue. OBD2 scanners have many functions, but the most basic is to “read” engine fault codes. ![]() An OBD2 scanner is a computer that connects with a car to communicate with that vehicle’s onboard computer. ![]()
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