On my 2010 Toyota Corolla the key occasionally is very hot when I remove it from the ignition. Is there something wrong with the ignition? .The dealer said the Immobilizer makes the key warm, but the key is very hot.

Yes, it can be done manually as well as with a scan tool computer

Toyota Corolla Immobilizer

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Feb 1, 2010 - 2 Turn the key to on position and before 15 seconds, press and release the accelerator pedal for exactly 5 times. 3 Now, before 20 seconds, ...

How do i reset the toyota corolla anti-theft system?

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Apr 10, 2020 - Attempt a DIY reset by inserting the key in the ignition and turning to the "on" position, without cranking. Leave the key "on" for 10-15 ...

5 answers · Top answer: The anti-theft system of the Toyota Corolla works to disable the fuel injection and ignition of Your vehicle through the ECU if a security breach is detected. ...

Download Link:
http://www.repair-guidebook.com/2009-2010-toyota-corolla-service-repair-manual-pdf-download

Give us a list of what you have done so far. What you could do for starters is to check spark plugs, plug gaps, fuel filter (important). Check the fuel filter for dirt and especially for water.If you find any of these two miscreants in the filter, you may suspect they come from the fuel tank, which will need to be removed and cleaned, and the whole fuel line flushed and cleaned including the carburetor / injector system. Also check the air filter. It will have to be very dirty to give the problems you describe, but check it in any case.

Get the Ecu error codes read at your favorite parts store if you can get it there. Most likely you have a fuel supply system problem. A large number of devices can cause this kind of trouble.

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.

Shouldn't be holding it. The switch is spring loaded and just signals the chime when the key is in.
You may have damaged tumblers in the lock cylinder or something wrong with the teeth on the key. Can you try a spare key ?

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.

Usually, something in the combustion chambers is too hot causing self ignition--carbon deposits in the head(s) that glow or the wrong spark plugs that run too hot. This problem usually makes a lot of 'clinking' sounds. If it seems to be running normally, replace the ignition switch which is probably remaining on in spite of being turned off!

I purchased a 2010 Corolla in Jul\t 2009. For two months, several times, the key was hot when I removed it from the ignition. I was told it was due to the Immobilizer chip in the handle. I'm concerned as it happened again in Sept 2010. and if it does this periodically I feel in time it could cause a dangerous problem as cars have caught fire due to ignition problems. What response did you get from your dealer or how did you sove your problem??

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???