I have a cheapo I got of Amazon for $20. It shows you a number, look it up online, then if you can fix it. It also allows you to cancel bogus service lights that pop up from time to time. Basic, no batteries, no apps, plug an play.
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2017 SLX 195RB
2021 Jeep Grand Cherokee Summit L 5.7L V8
Andersen WDH hitch, Renogy 100 AH Lithium &
200 Watts solar panels from Renogy
Prev. '14 Jeep Grand Cherokee Overland, gas 3.6 V6
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