got it back earlier today. They replaced the fuel injector set (16010-RLV-315) and the fuel joint pipe set (16012-R9P-315). So far so good. I will post back in a few weeks (or sooner if the light comes back on....fingers crossed)New-to-me ridgeline owner here. 2018 RTL with 18k miles. Have only had the car for three weeks and yesterday i got the "emissions system problem" and took it to the local Honda dealer. They called me this morning and the service advisor said they replaced the "injector". I'm hoping this means they replaced all six but i will report back after a bit to see if the issue is resolved.