Vehicle Questions and Answers
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A Honda Maintenance Minder alerts you when your Honda needs servicing and specifies the type of service required. For instance, a “1” indicates that only the engine oil needs replacing, a “2” means tire rotation and checking tire pressure and condition. Additionally, a “3” suggests replacing the air cleaner element, checking the drive belt, and replacing the dust and pollen filter. When you see a “4” on the display, it signals the need to replace the transmission fluid and transfer fluid (if your vehicle is equipped with it), while a “5” denotes the need to replace spark plugs, timing belt (if applicable), inspect the water pump, and check valve clearance. A “6” means it's time to replace the engine coolant, and if your vehicle is equipped, you should also replace the rear differential fluid. It's important to follow all of the manufacturer's recommendations to maximize the lifespan of your Honda Civic.
The code "a12" on a Honda Civic indicates that it is due for an oil change, tire rotation, and engine air filter replacement.
The code "a12" indicates that if you've had an oil change recently, you will also need to reset the odometer.
Why, though, won't the car start?
This indicates that A12 appears on the dashboard.