My door lock cylinder is jammed halfway through the lock position and neutral position on my 2004 Honda Civic Ex. It got stuck yesterday so I tried spraying a bit of lubricant in the cylinder but I've had no success. Any ideas what it could be? Thanks in advance.

 

It could be a broken lock cylinder.

 

there are any number of options that come to mind, but at the end of the day, you're removing most of the door components to find out and actually complete the troubleshooting.