IF you have this fault code in you Wk2 Jeep Grand Cherokee you need to replace Bank one sensor one temperature sensor. It is located in the back of the exhaust manifold and we have made a video on this in the past showing how to change it. If you need that video you can find it by clicking the link below
However if you are still getting that code after you have changed the sensor, you may be dealing with this problem. Watch the video below and we will show you how to resolve this.