Cleared a CEL on the Highlander! 2124 O2 sensor. Threw the same code about a year and a half ago, first time it’s come back. Ran errands today, light stayed off.
Might have to replace that sensor someday. Luckily it’s the one right on the front of the engine. Bummer is that everyone says to only buy the OE sensor which is about 200 bucks. But if they last 14 years and 350K, then that’s cheap.