I just did one of these the other day, I removed the transmission pan and found a screw on filter had backed itself off. Good luck, transmissions are hard to fix this should keep you busy for a while that may know if you need more information
Symptom: P0841-LR PRESSURE SWITCH SENSE CIRCUIT When Monitored and Set Condition: When Monitored: Whenever the engine is running. Set Condition: The appropriate code is set if one of the pressure switches are open or closed at the wrong time in a given gear. Possible Causes LOSS OF PRIME P0944 PRESENT RELATED RELAY DTC'S PRESENT L/R PRESSURE SWITCH SENSE CIRCUIT OPEN TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT OPEN L/R PRESSURE SWITCH SENSE CIRCUIT SHORT TO GROUND L/R PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE L/R PRESSURE SWITCH TRANSMISSION CONTROL MODULE INTERMITTENT WIRING AND CONNECTORS
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Tuesday, November 23rd, 2010 AT 5:08 AM