I drive older cars and this has all the features you need to see if your car is ready to be tested. My cars are quite old and the check engine light comes on frequently and this is the cheapest all in one that gives me enough information to know if I can fix the problem or if I need to pick up the car. I used to have a bluetooth OBD sensor that connected to my phone and works, but this is much better because it's cheaper and I don't have to worry about connecting it to my phone.
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