The car seems to be runniing fine but the check engine light came on and on the screen on the dash gave me an emissions workshop warning the code game up mass airflow sensor. Any way to test it before I shell out $500 thanks Rick

First, try cleaning the MAF Sensor:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-hondas-selected-other-vehicles-46563-8.html#post1377134