There is NO sensor for ATF quantity. You were wise to check it. Ask the dealer to top it off.
Honda's Maintenance Minder signals the need for engine oil changes based on several factors (cold starts, RPMs, mileage) and will vary with usage. All the other services (ATF, filters, rear differential fluid) are based on mileage, though. Those codes will come up when the service is 'close' to an oil change.
For an ATF drain & fill it's a 30K mile cycle.
Honda's Maintenance Minder signals the need for engine oil changes based on several factors (cold starts, RPMs, mileage) and will vary with usage. All the other services (ATF, filters, rear differential fluid) are based on mileage, though. Those codes will come up when the service is 'close' to an oil change.
For an ATF drain & fill it's a 30K mile cycle.