Hi, my Civic will start but as soon as I release the key, it dies. If I start the car but hold the key in, the car will continue to run until I release the key. Can I replace the ignition lock cylinder only (where you put the key) or do I have to replace the entire ignition switch? Since it it the ignition lock cylinder that seems to be the problem, I was wondering if I can replace only this part vs. then entire ignition switch?

Be glad that you only need to replace the ignition switch:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-hondas-selected-other-vehicles-46563-2.html#post224652

Easy job.

Could it really be that easy. If there is a way to mess it up, I will find it.