There are several reasons this could occur. The first option would be that the oil is low or perhaps the Transmission Fluid is low.
How do you reset the maintenance light on a 2001 Honda accord ex I found some options at http://www.tegger.com/hondafaq/maintenance-reqd-light.html#why
HOW TO TURN OFF THE MAINTENANCE LIGHT ON 2002 HONDA ACCOURD
Owner's manual!
Get your oil changed, and have the service reminder reset.
To reset the maintenance required light on a 2005 Honda Accord Hybrid, turn the ignition to the "ON" position without starting the engine. Press the gas pedal three times within five seconds. After this, the maintenance light should turn off. If it doesn’t, repeat the process to ensure it was done correctly.
The Maintenance Required Light is not the same as the Check Engine Light. The Maintenance Required Light is telling you that there is scheduled maintenance that needs to be performed. It may mean it needs an oil/filter change. To find out what needs to be done look at the maintenance schedule in your owner's manual.
It means there is scheduled maintenance required. Your owners manual will tell you what is needed.
It meand you need perform maintenance on the vehicle. Check the owners manual for what is recommended at the car's mileage
The Maintenance Required Light is not the same as the Check Engine Light. The Maintenance Required Light is telling you that there is scheduled maintenance that needs to be performed. It may mean it needs an oil/filter change. To find out what needs to be done look at the maintenance schedule in your owner's manual.
approching maintenance
Two reset the maintenance required light on a 2005 Honda Accord all you have to do is hold the odometer reset button on the gage panel for about 30 seconds while the key is in the on position. Not running just in the on position. it will reset.
Have vehicle scanned to determine codes