To reset the 2015 Honda Odyssey maintenance light, please follow these instructions:
non Multi-Information Display:
1. Turn the ignition to run (one position before starting engine).
2. Press and hold the SELECT/RESET knob for 10 seconds or more.
3. Turn the SELECT/RESET knob to select oil life.
4. Press and hold the SELECT/RESET knob to enter the oil life reset mode.
5. Press and hold the SELECT/RESET knob for 5 or more seconds to reset the display to 100.
6. Turn the ignition off and then start the engine to verify the indicator has been reset.