Troubleshootin po1391 and po740

basic mechanic knowledge will not get this fixed. go to a tranny shop let them know what the codes are they will be able to fix it faster and correctly without further problems.

It should be attached to transmission block, I will see if I find a diagram.

PO740 = Torque Converter Circuit Malfunction

Check all of the torque converter's electric connections--especially on that solenoid (but not just that part). It could be the transmission speed sensor. Just check from the transmission to the fuse box to make sure that the electric circuits have solid connectivity. Don't let oil short it out.

Code 740 is a problem with the torque converter clutch circuit.
The converter solenoid and circuit would need to be checked out.

P0740 Torque Converter Clutch Circuit Malfunction

P1391
Intermittent Loss of CMP or CKP

When you disconnect the connector for this part, remember to have the computer cleared if the check light is on. Use an Ohmmeter and test the continuity of the wires going to the internal parts. If there is continuity check the plug connector for corrosion as it may just have lost the connection in the joint. WD40 may help.

If you ask your question for the swap then go to Howtodothings.com and ask how to install this switch. It will tell you. Seems that it is a teardown that you have to lift the motor to do.

Go to any auto zone. They will read the codes for free and tell you what they are.

po356 ignition coil #6 primary circuit
po700 transmission control module
po1391 loss of cam or crank sensor signal
po1793 communication error
check your transmission fluid
replace the cam sensor

lock up control solenoid A B C is in fault causing your code that is inside the transmission most likely possible need rebuilt or used trans in if solenoid will not cure the problem

PO700=Transaxel control system
PO740=Torque converter lock up. No RPM's
I would take a good look at the transmission.