, would that stop it from starting because it isn't?

P1509--Idle Air Control Valve Circuit Failure. It's located on the back of the plenum. I haven't seen this code before, but I wouldn't be surprised if it caused your engine to stall.

Perform the tests in the link below:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-hondas-selected-other-vehicles-46563-2.html#post229012