ODB2 give error P0136

As your car is a 4 cylinder it only has bank 1 . It does have sensor 1 and sensor 2. Sensor 2 will be the O2 sensor behind the catalytic converter in the exhaust system . replacing the sensor will probably fix the issue however its always a good idea to check the wiring around the sensor as they have been know to get burned by the exhaust pipes. when reinstalling the new sensor keep the wires clear of the pipes . This site will help with understanding the O2 system

https://www.aa1car.com/library/oxygen_se...

Hope this helps