Key is stuck

Some cars have an interlock between the Shift lever and the ignition key. Make sure you have the shift lever all the way into the Park position.

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My ignition key will not turn to off. I can remove the key, but it stays in the accessory mode. What's the fix?
My ignition key will not turn to off can remove the key but it stays in...

2.
Ignition key is stuck and does not turn Inspection Service & Cost
Ignition key is stuck and does not turn Inspection Service Cost...

3.
Ignition key won turn

Try rotating the steering wheel. I've had this happen from time to time in cars where the wheel is almost in the lock position, but not quite. You may have to jiggle it to remove the key.

some of these electric interlocks require the brake pedal stepped on for releasing..have you tried that? along with shifting fully into park a few times?

Go to the auto parts store and buy a new ignition switch and key, remove the steering wheel and replace it.

turn the key slightly back and forth while pulling the key out

Your Civic has immobilizer, which means it will not allow duplicate keys. There are high chance that your old keys are worn out and this could be the reason. Any ways i would suggest you how to remove the keys but involves bit technical work . The LHS dash board part can be unscrewed and removed fully using the car manual, once removed the key holder joints to 4 brace compartment and there is a button beneath it, you need to press the small red button to release the key. This is not a standard method of removal, if your car has security alarm make sure you turn it off.. please remember - this suggestion should be followed only if this is your car. I;m not responsible for the solution being incorrectly followed without following manual.

It can be faulty ignition lock cylinder.I suggest to wiggle the steering wheel a bit and see if the key gets released out.If that is not helping then first turn steering wheel to right and try removing the key,or next turn steering wheel to left and see if you can remove the key.
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Spray wd-40 in the ignition key hole and let it remain there for few minutes,after that once again try to remove the key and see if that helps.
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But if that is not helping then ignition lock cylinder has to be removed out and key has to be manually removed.
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For more troubleshooting on these types of issues,i suggest you to refer the help links mentioned below.Its the accurate solutions mentioned in it.that will help you to narrow the problem:-----
Click the link below:------

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1999 Toyota Camry: Key Will Not Come Out Of Ignition?

http://whatisbyme.blogspot.in/2012/05/1999-toyota-camry-key-will-not-come-out.html
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2001 Toyota Tacoma: Ignition Locked?

http://technoanswers.blogspot.in/2012/04/2001-toyota-tacoma-ignition-locked.html
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Ignition Switch Will Not Turn Off?

http://schematicsdiagram.blogspot.in/2012/04/ignition-switch-will-not-turn-off.html
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Car will not turn the ignition to start?

http://technoanswers.blogspot.com/2012/01/car-will-not-turn-ignition-to-start.html

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Ignition Key OFF but engine still running?

http://howtobyme.blogspot.in/2012/03/ignition-key-off-but-engine-still.html
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Chevrolet Malibu: Key Stuck in ON position?

http://technoanswers.blogspot.in/2012/04/chevrolet-malibukey-stuck-in-on.html

2012 Dodge Ram: Ignition Key will not release?

http://whoisbyme.blogspot.in/2012/07/2012-dodge-ram-ignition-key-will-not.html-----------

Ignition locked up on Mercury Villager?

http://technoanswers.blogspot.in/2012/01/ignition-locked-up-on-mercury-villager.html-------------

Key won't turn in the ignition on Toyota land cruiser?

http://technoanswers.blogspot.in/2012/02/key-wont-turn-in-ignition-on-toyota.html

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How to remove ignition switch on VW Car models?
http://schematicsdiagram.blogspot.com/2011/12/how-to-remove-ignition-switch-on-vw-car.html
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How to Replace Ignition Switch on Chevrolet Caprice Classic?

http://schematicsdiagram.blogspot.com/2011/12/how-to-replace-ignition-switch-on.html

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1995 Ford Taurus: Ignition switch not turning OFF?

http://repairhelpcenter.blogspot.in/2012/06/1995-ford-taurus-ignition-switch-not.html
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Ignition Problem Troubleshooting

http://whoisbyme.blogspot.in/2012/07/ignition-problem-troubleshooting.html
------------------These will help.Thanks.

You may want to try pushing fordward harder into the park position while turning the key to the off position. The locking cable may need adjustment. If this does not work, try turning the collar just behind the keyswitch counter clockwise while trying to remove the key.Thanks, Dana

You will need to remove the lock cylinder and take it to a qualified locksmith. Access the cylinder by removing the trim panels on the steering column. After you remove the bolts securing the cylinder, there is push-tab on the underside of the cylinder that must be depressed with a small screwdriver to remove the cylinder.