See in 2000 only a 3 speed trans was available, in 2002 only an overdrive was available in a 3speed there is no trans computer and the PCM turns on TCC. With an overdrive trans, the PCM doesn't control the transmission at all, the trans computer does it all.

2001 could have come with either trans.

 

For the 2000 Dodge Neon: Trouble code P0743 means: Torque Converter Clutch Solenoid Circuit Electrical

So if the PCM is storing that code from the previous car (not sure if it would) then that's what error it thinks it has.

 

No, it's making the code. Put a computer that's expecting to see a signal on a terminal for TCC then put it in a car that doesn't have that wire and guess what, you get a TCC solenoid code because there's nothing there (no continuity of the circuit)

 

I said that I believed the 2000-2002 PCMs were the same, as the 2002 still had a separate TCM. 2003 was when they made them one unit.

 

Oh, I didn't know it was you that told him that. I took the time to verify interchangeability before I stated that he can't put an 2000 PCM in a 2002 due to the fact of the transmission change. I checked my facts before I guessed an answer.

 

hey guys im back on this morning and going to tackle this mess here in a little bit. wish me luck.

1) puttin original PCM in to see if p0743 gets thrown
2) checkin wires for breaks (again)

 

For someone who has gotten upset very easily about what others have said before, perhaps you should start to choose your wording and how you approach certain situations a bit better.

I wasn't stating my answer to him as fact; I told him what I'd get. I would have bought any of the years that I said as well. It is unfortunate that it didn't work and I can sympathize. I've had the same thing happen on others' advice. It will take a little time, but I'm sure he will be able to sell that PCM for what he paid. There is always someone looking for a part you have.

 

come on guys lets all try and get along, there's no hurt feelings in a grown up forum like this one.

on the other hand:

I swapped out the pcm to its original. The car runs just like before but good news is there's no p0743 code.

The speedo still doesn't work, FYI

I rented a OBD2 scanner from autozone, is that sufficient enough to pull codes, does auto shops have better scanners where they go in more depth.

 

on OBD code reader is pretty much useless for transmission diagnostics.

You've got so many problems, you need to focus on the most important one first.

So start over, you have a car that stalls, trans doesn't shift, no speedo?

 

ok heres my current issues:

1. car doesnt shift
2. speedo doesnt work

It doesnt stall anymore. it runs fine but just doesnt shift