To reset the 2010 Toyota Prius maintenance light, please follow these instructions:
1. Press the “ENGINE START STOP” switch once (do not start engine) or turn ignition key to run (one position before starting engine).
2. Ensure Trip Metre A reading is shown. Turn the ignition off.
3. While pressing the Trip Meter reset button, press the “ENGINE START STOP” switch once (do not start engine) or turn ignition to run (one position before starting engine).
4. Continue to press and hold the button until the trip meter displays “000000”.
5. Turn the ignition off and then start the engine to verify the indicator has been reset.