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I try to tell people online that a low-cost obd2 dongle in a Prius will not give you what you need when you need it
I figured a video would be better than a bunch of words, let me know if you have any questions! This is the OBD2 Device I recommend for the Prius!
You can click here to view the OBD2 video for the Toyota Prius if the above does not work.