Thank you for bringing that up. I wasn't aware (or forgot) that was a separate warranty.
Hopefully it does fall under the 'select emissions-related' category and is covered.
Emissions-related components are warranted for 2 years of 24,000 miles, whichever comes first
Select emissions-related components are warranted for 8 years or 80,000 miles, whichever comes first. Covered components include: catalytic converters, engine control module, transmission control module and other diagnostic-emissions-critical electronic control units
That does give me a little hope, and with that, I suppose my best option is to put it in line at the dealership and let them diagnose the problem.