Hard to tell, I disconnected the battery before I got this scanner and it wiped the engine light. Now you have to drive and wait for the lights to come back on to see the problem or if there is one. Also, it seems pretty easy, if you are having trouble figuring out how to use it and what it means, only Youtube Scanner and watching the video will help. The scanner looks and feels good. I recommend getting a case I made so it doesn't wobble.
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