On the 2004 Honda Odyssey, the Maint Req’d light is pre-programmed to come on at certain mileage intervals. It’s just to alert you when it’s time to change the engine oil and oil filter. If the light is not reset at the time of the oil change, the light and the “actual” oil change interval will not be in sync. To reset the light us this procedure:
-Turn off the engine.
-Press the select switch and reset switch at the same time, turn the ignition switch ON (Position II).
-Hold both buttons more than 10 seconds, until the indicator resets.
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