Help! Transmission Code/Sensor

[J'sJeep]

2003 Jeep Liberty Sport 3.7L 4x4 127k miles

Check Engine light came on. Checked the code, P0841: Low/Reverse (LR) pressure switch rationality fault.

I don't know JACK about transmissions so I turned to my Haynes manual for the code which explained: transmission fluid pressure sensor/switch "A" circuit range/performance problem.

Can anyone elaborate on this for me? There is also a sensor/switch "B" so I don't know which sensor "A" or "B" would be even if I got under there to find them. The Haynes manual does not have much of anything on the transmission especially trans sensors.

Anyone have or know where to find a schematic for location and replacement of this? Midas doesn't want to mess with it and recommended AAMCO which I don't trust too much lol.

Any help is greatly appreciated. Thanks guys.

-J