Question about 2002 Jeep Liberty

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Po846 - 2002 Jeep Liberty

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  • bozo pv Feb 19, 2013

    Before the check engine light the trans was working ok after i changed the tressure sensor the gears shift ok overdrive engages to high rpm what cauces this.



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DTC P0846 - Transmission Fluid Pressure Sensor/Switch "B" Circuit Range/Performance

The pressure sensor codes are the ones to concentrate on first. typically gear ratio error codes are set from internal transmission failures but since you also have pressure sensor codes it may just need a new sensor. Remove the connector to the solenoid pack and check for broken or damaged pins and also see if water is getting into the connector.

The chances are that the sensor is bad. If that is the only code your getting then you might want to replace the sensor. Make sure the trans is full though, as that would make the pressure low and could set the code. Here is where the sensor is.

1. Raise vehicle.
2. Place a suitable fluid catch pan under the transmission.

Po846 - 2_14_2012_3_14_19_pm.gif

1. Remove the wiring connector from the line pressure sensor (Fig. 83).
2. Remove the bolt holding the line pressure sensor to the transmission case.
3. Remove the line pressure sensor from the transmission case.

1. Install the line pressure sensor into the transmission case.
2. Install the bolt to hold the line pressure sensor into the transmission case. Tighten the bolt to 11.9 Nm (105 in. lbs.) .
3. Install the wiring connector onto the line pressure sensor
4. Verify the transmission fluid level. Add fluid as necessary.
5. Lower vehicle.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Posted on Feb 14, 2012

  • bozo pv Feb 15, 2013

    I changed the pressure sensor and tried it the trans shifts ok but my overdrive kicks in at 3500 it should be 2000 rpm what is cosing this.

  • bozo pv Feb 16, 2013

    My overdrive worked fine before the light came on for pressure sensor i changed the sensor now my overdrive kicks in way to hi rpm.



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