@richquaal Check engine lights are usually emission based problems.
@richquaal Be careful when it comes to O2 sensor stuff. There are up to 3-4 on some cars and some not so good shops will start replacing parts without knowing which is the problem. I'm an old school muscle car guy, I know how they try to get you.
@Ch3fchr1sto
Code came back bank 2, sensor 1. Vehicle has over 100k mi. I had them replace a leaky cat converter a year ago. You're right, there are 4 sensors. But i'll trust them because they're the only non-dealer shop in this small town where i've taken my vehicles for 9yrs. Doesn't mean the bank 1 sensor won't go bad also though, so thanks for the advice! (I watched a few vids to see what's what. Which also proved my knowledge is limited.)