Question about 1999 Jeep Grand Cherokee
The speed sensors you replaced where most likely accessed from the outside of the Transmission. The solenoid the current fault is referencing for the most part is no harder to replace but Identifying which one it is will actually be the problem. There are most likely 3 to 4 switches inside the transmission and the fault could be any of them. You maybe able to identify them with a Haynes repair manual on the vehicle. Some of the manuals do show these while others do not. You would have to check the manual on your vehicle to know if it does or not. Typically there are only 2 to 3 Torx head screws that hold them in place so they are pretty easy to change once you get the Transmission pan off.
Posted on Jul 16, 2010
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Posted on Jan 02, 2017
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Trouble Code: P0846
A/T 2/4 Pressure Switch Circuit Malfunction
2/4 pressure is incorrect, or internal transmission faults exist 2/4 pressure switch circuit is open, shorted to ground or power 2/4 pressure switch is damaged or it has failed TCM relay power circuit to L/R switch is open (loss of B+) PCM/TCM has failed
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