Thanks for the replies!

I noticed the CEL was off when I drove the car home from the dealer. I'll wait and see if it turns back on. If so, I'll check it out at AutoZone. I was considering going somewhere else for (hopefully) a lower quote but I'll wait it out and see how it goes. I would consider doing it myself if it's reasonable.

I'm assuming I need this fixed in order to pass inspection?

My car is a 1998 Accord EX with 4-cyl. engine and a 5-speed manual transmission.