After seeing this, you will probably think that automakers will leave Easter eggs in the future for people to discover if the right buttons are pressed.
Here we will see a “secret” diagnostic mode you can unlock for your second generation Toyota Prius. It is should work for all models produced between 2003 - 2009. The trick puts the central console display in Diagnostic Mode, enabling you to check up on different parameters of the vehicle.
To get into the diagnostic mode insert the key in its slot, press the power button twice without touching the brake pedal and then hold down the info button while you flip the headlights on and off three times.
Now, the central display will show a new menu called System Check Mode, which is pretty much the equivalent of those OBD testers the services use to diagnose your vehicle.
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