Q: Q: Rough idle

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My Avalon was idling rough 2 weekends ago, then check engine light came on. Took it to dealership, they couldn't confirm the issue without a "complete teardown" but thought maybe there's a problem with a valve... (camshaft?) The car is running smooth now, and since Wednesday the check engine light isn't on anymore but I'd still like to have it looked at. (The timing belt was replaced about 4 years ago in case that matters.) It's a 2002 with 174,000 miles. Any guidance/thoughts you can provide are greatly appreciated! I'm not sure which YourMechanic service to select to get a quote and schedule an appointment.

My car has 174300 miles.
My car has an automatic transmission.

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