What's the Acura code a123?

When You see Your Acura throw a code A123, You shouldn't be alarmed, as unlike diagnostic trouble codes (DTCs), this is just a maintenance reminder that You need to do an oil and filter change, rotate the tires, and do an in-cabin air filter change. If You've already addressed the maintenance needs, to reset the code, You can do the following: Turn the car on without turning on the engine. Press the select/reset button until You get to the tire pressure and SHAWD notification. Press and hold down the select/reset button for 10 seconds; You should see the oil reset prompt show up, and You can select RESET here. Select that, and then turn off Your Acura. The reminder light should now be off.