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You should get the bt scanner. Every car is different and they don't guarantee no codes will be thrown. I have the jb3 and on most cars map 5 doesn't throw codes but it did on mine. Default setting on jb3 is map 3 and I was great there. Terry says map 5 shouldn't throw codes but he also says better to be sure and scan the car. I put it in map 5, it threw a tuner code.
Your warranty is worth thousands, the scanner is +/- $250.........sounds like a no brained to me.
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