Every OBD-II scanner can monitor Check Engine codes. The cheaper a product, the less they can do with the codes. Base model scanners can read a Check Engine light code and tell you what is triggering it. More advanced monitoring devices can detect the issue and clear or reset the code. The most expensive models typically explain specific repair needs and estimated costs.
OTHER DASH LIGHTS
Some OBD-II scanners can only monitor Check Engine lights. More advanced devices can read any dash light your car may have. This includes ABS (or brake) lights, seatbelt lights, airbag lights, and battery maintenance lights.
DATA LOGGING
Whether your diagnostic tool is a Bluetooth-enabled monitor or a plug-in device, a lot of companies offer the ability to keep track of your vehicle's history of repairs. Data logs can show you trends, predict future issues, and keep track of the money spent fixing issues over the years.
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