Check Engine light 1999 4Runner 6

[newoldwave]

The check engine light came on for my 1999 4Runner limited 4wd 6 cyl today. Pulled code p0133 (heated oxygen sensor). I simple reset the car's computer (disconnect battery for 10 min), restarted the engine and light did not come back on. I will watch from now on and R&R the sensor if the light comes back on.