Honda Civic models with power door locks and keyless entry systems come equipped with entry remote transmitters. Replacement transmitters can be purchased at a Honda dealership or online at websites such as keyless-remotes.com. While factory transmitters bought at the dealership can be programmed at the time of purchased, the cost of these transmitters might be more than aftermarket products. Aftermarket transmitters bought online generally cost less but require the vehicle owner to perform the programming.
Enter the vehicle, close all doors and insert the key into the ignition.
Turn the key to the "on" position, then press and hold the "lock" button on the remote transmitter for 1 second. Release the "lock" button, then turn the key to the "off" position. Repeat all the tasks in this step two additional times.
Turn the key to the "on" position, then press and hold the "lock" button on the remote transmitter for 1 second. The door locks will lock and unlock indicating the vehicle has entered remote programming mode. If the door locks do not cycle, repeat all steps to enter the programming mode.
Press and hold the "lock" button on the transmitter for 1 second to program it. If programming is successful, the door locks of the vehicle will cycle. Repeat this procedure for each additional transmitter to be programmed, including older working transmitters. Three remote transmitters can be programmed and each must be programmed within 10 seconds of the other transmitters.
Turn the key to the "off" position to exit programming mode. Remove the key, exit the vehicle and close all doors. Test each transmitter by locking and unlocking the doors.
Entering programming mode resets all remote transmitters. New and existing working transmitters all need to be programmed while in programming mode to work with the vehicle.