Po731 and po700 the car don't change speed - 1999 Dodge Intrepid

all refer to the TR sensor , VSS and TCM
check wiring and have each unit professionally checked by an accredited transmission shop

P0700 Transmission Control System Malfunction P0445 Evaporative Emission Control System Purge Control Valve Circuit Shorted P0442 Evaporative Emission Control System leak Detected (small leak) P0841 Transmission Fluid Pressure Sensor/Switch A Circuit Range/Performance P0846 Transmission Fluid Pressure Sensor/Switch B Circuit Range/Performance P0732 Gear 2 Incorrect Ratio
Full list of the OBD2 DTC from P0700 to P0999

The po700 codes are transmission related ( turbine codes ) if I recall. Usually the tranny control module will put the tranny in 2nd gear which will give you the sluggish feeling. I would suggest having a tranny pro look into this and isolate the problem for you

Code 731 is for a problem with the gear ratio for first gear.
Code 700 is a general fault code that means you have a problem with the transmission control module or the transmission.
The 731 code can cause the 700 code, and the problem could be a speed sensor inside the transmission. The computer does not like the signal being sent from the transmission to the computer.

Well looks like I have answered this question before for someone else.
Code 700 is for a problem with the transmission control module, 731 is incorrect first gear ratio, 841 is a problem with the low-reverse pressure switch, and 1776 is a problem with the low-reverse solenoid.
These components would need to be tested by a transmission shop.

Sounds like you have a bad shift control solenoid.You can get one from www.rockauto.com for $114.00 the part # is 2N1201.

check the input and output speed sensors for failure,or of different voltages,and or replace both of them at the same time.

dodges do not have a strong transmission, I would be checking salvage yards for a replacement.

Do check the motor mounts! Start the car, have a helper shift from reverse to drive! Is there a lotta engine movement?? Replace the faulty mounts. My quess it is almost flipping over! The output speed sensor likely on the back middle of the trans. There are only 2 connectors, the other is backup lights. Best I can do at this time! Frankster016

see my comments, not 100% sure that it was the out put speed censor or not, but after reconnecting the wires to a new censor and reconnecting the battery and clearing codes it worked. connection was not clipped may have been loose