Just fixed my P0141 code which was the sensor after the CAT.

Now a month later I am getting a P0139 code

BANK1 Sensor 2.

Is that the same sensor?

I will post pics as soon as I figure out which one I have to change this time.
Sign

thanks

 

Today's computerized engine control is dependent upon a variety of sensors to regulate engine performance, emissions and other important functions. The sensors must provide accurate information elsewhere mobility problems, increased fuel consumption and emissions of errors can occur.
One of the key sensors in this system is oxygen (O2). It is often referred to as "O2" sensor because O2 is the chemical formula of oxygen (oxygen atoms always travel in pairs, never alone).
The first O2 sensor was introduced in 1976 on 240th Volvo vehicles in California received the next time in 1980 when the rules of the California emission that require abatement. Federal legislation on emissions is O2 sensors virtually mandatory on all cars and light trucks built since 1981. And now that OBD-II regulations are here (1996 and newer cars), many cars now equipped with multiple O2 sensors, and some make it four!