How do you turn off the maintenance required light for a 2004 Honda Civic Lx?

If you have done the required work to correct the problem, all you then have to do is remove the battery cables from the battery, wait 10 seconds then replace them. This will reset the check engine light. The above answer is incorrect. Removing the battery cable will not reset the check engine light. This must be done with an OBD2 scan tool. You said maintenance required light. Are you referring to the light that reminds you to change the oil. If so, you can reset this light according to instructions found in your owner's manual.