04 Pacifica - Currently has 128K and have been running AMSOIL tranny fluid since 60K. Typical trans. problems. Will not shift into gear or shifts into limp mode, always intermittent. Pulled DTC - 0700, 0731, 0732, 0733, 0841, 0846. Decided I needed to change the xmsn solenoid. Changed the solenoid, input and output sensors. changed fluid (again AMSOIL) and replaced filter. Now am getting DTC 0700 and 0750 codes. Goes immediately into limp mode. I need more suggestions. Tomorrow I am going to swap around the relays to see if that is the problem.
I suspect it is the wiring harness, and I dread trying to splice on a new solenoid pigtail in that limited space.
Any suggestions would be appreciated.

 

P0750-LR SOLENOID CIRCUIT
When Monitored and Set Condition:
P0750-LR SOLENOID CIRCUIT
When Monitored: Initially at power-up, then every 10 seconds thereafter. The solenoids
will also be tested immediately after a gear ratio or pressure switch error is detected.
Set Condition: Three consecutive solenoid continuity test failures, or one failure if test is
run in response to a gear ratio or pressure switch error.
POSSIBLE CAUSES
RELATED RELAY DTC’S PRESENT
TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT OPEN
LR SOLENOID CONTROL CIRCUIT OPEN
LR SOLENOID CONTROL CIRCUIT SHORT TO GROUND
LR SOLENOID CONTROL CIRCUIT SHORT TO VOLTAGE
LR SOLENOID/PRESSURE SWITCH ASSEMBLY
POWERTRAIN CONTROL MODULE
INTERMITTENT WIRING AND CONNECTORS

 

Did you use a brand new OEM dealer solenoid ? If so have the dealer check it out. Recently there have been more than one "new solenoid" that has failed. Another item is a TSB that is for 1776 but may shed some light..
http://www.lhforums.net/forums/showt...hlight=Alldata

 

Thanks for your replies.
I used a new Borg Warner solenoid purchased online. I was surprised that the previous codes on the old solenoid were replaced by the P0750 on the new solenoid. Sat. I switched the relays around with no positive results. I removed the outer insulation from the solenoid pigtail but did not notice anything wrong with the wires. Tomorrow I will do a continuity check on the wires to the PCM.
I did find a Chrysler Service Bulletin (21-001-04) which states the DTC P0750 along with some others may be misleading and could actully be caused by a PCM fault. It gave the s/n range of the suspect PCM and recommended replacing the PCM if it was in that range.
guess I will pull the wheel and splash guard to see if mine is in that range - have to do the removals to do the continuity checks anyway.