KONNWEI OBD2 scanner was very helpful in diagnosing the trouble code in my 2011 Toyota Tundra 4.6L. The Live 02 sensor data is extremely useful, as is the coolant temp check. This tool is very good value and I highly recommend it and it is very easy to use. Also positive is the ability to update the firmware. Check your codes first so you know the most common problems and get a better idea if the mechanic is trying to overcharge for a job that may not even be needed. In general, the scanner is excellent.
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