If the keyless remote battery or the vehicle battery is dead, use the key instead of the keyless remote.

Fully insert the key and turn it.
Locking/Unlocking the Doors Using a Key
When you lock the driver’s door with a key, all the other doors lock at the same time. When unlocking, the driver’s door unlocks first. Turn the key a second time within a few seconds to unlock the remaining doors.
Models with driver information interface
You can customize the door unlock mode setting.
Customized Features
Using the Remote Transmitter
Locking a Door Without Using a KeyHonda Civic Owners Manual. Resetting the Display
Reset the maintenance minder information display if you have performed the
maintenance service.
Turn the ignition switch to ON
and have
the vehicle at a complete stop.
Display the Maintenance Minder by
repeatedly pressing the (TRIP)
knob.
Press and hold the ...