Hyundai Tuscan 2007 - P0159 how do you tell if it's the right or left sensor?

Question

Check engine light keeps coming on and then going off I a couple of days.

Answer 1

P0159 H02S circuit slow response (Bank 2 Sensor 2)

Bank 2 is where cylinder # 2 is located and Sensor 2 are catalytic convertor monitor or downstream.. What this code condition is, is to monitor the catalytic convertor. The catalytic can also be affected by intake or exhaust leaks worn sparkplugs can cause this code condition.