When a Honda CRV's maintenance light comes on it means that the vehicle is due for some kind of maintenance or service. Service required can include oil changes, tire rotations and brake adjustments, among other maintenance items.
In the CRV, Honda incorporates a Maintenance Minder light on the vehicle dashboard that notifies the driver when service and maintenance is due. An onboard computer system in the vehicle monitors the engine performance and operation controls when the maintenance minder is activated.
Maintenance items use a code system that includes a main code and a sub-code. Main code A means that only the oil is due for a change. Code B indicates that in addition to an oil change, the brakes need inspection, the parking brake may need adjustment, and other items in the vehicle may need inspection.
The sub-codes use a coordinated time and mileage schedule that ensure performance of scheduled maintenance tasks at the same time as maintenance tasks indicated by the main codes. Sub-codes use numbers ranging from 1 to 6 and indicate that the air cleaner element, drive belt, and dust and pollen filter require replacement. The transmission fluid, transfer fluid, spark plugs, timing belt, water pump, engine coolant and rear differential fluid also have change interval recommendations.