use a screwdriver
Go to https://radio-navicode.honda.com/ Enter your VIN and audio serial code 10004418
first check for proper operation of your EGR valve. If that checks out okay. Then you need to replace your catalytic converter. Activate the EGR valve with a vacuum pump and you should be able to stall or almost stall the engine, if this occurs then the egr system is most likely operating properly, but there are other pieces to the system.