What does service code A1 mean on a 2005 Acura TSX?

Service code A1 on a 2005 Acura TSX indicates that the vehicle requires a routine maintenance service that includes an oil change (the "A") and a tire rotation (the "1"). The "A" signifies the need for an oil and filter change, while the "1" indicates that the tires should be rotated to ensure even wear. It's essential to follow this maintenance schedule to keep the vehicle running smoothly.