Key hot when removed form the ignition

if your trying to hot wire [bypass ] system not going to work ignition needs to recognize a key to start and with no ignition cylinder thats not going to happen

I had this problem once with a Daewoo. The cause was the wiring for the car stereo system. It had a relay in it that could lock open if you played music loud for a while because it got hot. The back emf was not stopped by the relay so it diverted power to the ignition. The relay had failed inside when it got hot.
Locate the relays in the car. There may be two or three kinds, depending on number of pins etc. Locate the ignition relay and see if there is another one that is identical (if not buy a new ignition relay) Swap over an identical relay with the iginition relay, see if it fixes it. If it does replace ALL the relays with Bosch relays, do not use Siemens relays, they do handle back emf very well.

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.

More than likely the "igniter" located inside the distributor is bad. It's a pricey part and often the best deal is to find a replacement distributor at your local parts supplier that will contain all-new parts, including the ignition module.

The transponder around the key which reads the chip is what the dealer means ,it should not make it excessively hot but it all depends on the person because as a mechanic i dont feel it as hot but the mrs uses a cloth ,so when it feels hot to you ask someone else to have feel as it may not appear hot to them .unless the heater vent is blowing over the key then i dont see why its should get that hot ,could be fault of the model i suppose but this is the first time i have read about this for this model vehicle

Brake light switch is bad or out of adjustment. It's mounted under the dash and is pressed to the off condition when the brake pedal is at rest. Look under the dash and follow the pedal arm up to the pivot and you will see or feel it. It is active with the ignition off.

If your key is 'twisted'. in the ignition-lock, I am sorry you won't have no choice but to remove the ignition-lock and dismantling it to free the stuck key.

Before removing the ignition-lock, try spraying a lubricant (WD-40) in the lock, and see it that frees the key.

the system on this car may not allow for more than 2 keys

TRY TURNING THE STEERING WHEEL LEFT/RIGHT WHILE PUSHING IN THE KEY AND TURNING IT ON

i have the same problem with my corolla 2002 I turn off the keys and put it out and the engine still running, I uplug the EFI fuse and the engine stop, I guess I need to replace the ignition.. or i'm wrong???