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.

Multi-Information Display:
1. Turn the ignition to run (one position before starting engine).
2. Display the engine oil life by repeatedly pressing the SEL/RESET button.
3. Press and hold the SEL/RESET for more than 10 seconds. The oil life reset mode is displayed on the multi information display.
4. Select RESET with the up or down button, then press the SEL/RESET button. The engine oil life will reset to 100.
5. Turn the ignition off and then start the engine to verify the indicator has been reset.