To reset the 2009 Acura CSX maintenance light, please follow these instructions:
1. Turn the ignition to (II) – do not start the engine. 2. Press the SEL/RESET button on the steering wheel until you see the engine oil life display. 3. Press and hold the SEL/RESET button on the steering wheel for more than 10 seconds. The remaining engine oil life reset mode will be shown on the multi information display. 4. Select RESET by pressing the INFO (up/down) button 5. Turn the ignition off and then start the engine to verify the indicator has been reset.