MIL 1744 what is it really?

[Andyb119]

I am occasionally getting the check engine light for the code P1744 "torque converter clutch solenoid circuit performance" when on the highway for extended distances. It may be at an acceleration point but I have to admit I don't always notice it right away. I haven't noticed anything with regards to driveability. Does anyone know what generates this code and what might be done to eliminate it.

Thanks,
Andy

[Rikenbomb]

Looks like one of the soleniods is on it's way out. It could be a simple replacement of a solenoid. I'm not sure.

[Black99Cougar]

I'm getting the same exact thing. Any news on this....keep us posted.

After highway driving, my car will slam from 1st to 2nd. This will stop after 20 minutes or so of city driving and be normal. I really only notice when getting of a highway and need to stop at a light.

[BobKaBob]

mines doing a similar thing... i have DTC P1714... solenoid mechanical failure...

One of my fellow mechanics said the CD4Es have intergrated solenoids, meaning the whole unit will need to be replaced... i will bring my car down to the transmission shop to find out.

At school, we have a program that would look up the DTCs and give you pin-point tests to fix the problem... but we just started a two week vacation so that idea is out :tongue:

i do have the breakdown of some of the trasmission DTCs, but 1744 isnt on it... but from the first two digits, you know its deffinately a tranny code...

bring it to a transmission shop, let them diagnose it for you...

[LostRacer]

I got P1744 "Torque Converter Clutch System Mechanically Stuck in Off Position"-Auterra Scan Software.

[Andyb119]

OK, this is what I have discovered. The P1744 code indicates excessive slippage detected in the torque converter clutch. The torque converter clutch is electronically controlled by a TCC solenoid located with four other solenoids in an assembly attached to the valve body. There are only a few causes/solutions. Naturally, any other trouble codes need to be repaired first since they can cause the PCM to give erroneous data to the transmission. Secondly, the connector on the transmission can sometimes become corroded or damaged again causing erroneous data exchange. Third the TCC solenoid can be malfunctioning. The solenoid is replaced as an assembly with the other four control solenoids but it is on the outside of the valve body just inside the pan so it is an in vehicle repair. Four is a failing Torque converter. Last is a bad PCM. The good news is that the problem can be determined with inspection and test equipment plugged directly into the transmission harness w/o the need to open up the transmission. I have no idea how common this test equipment is outside of a dealership. If anyone has access to TSBs it might be interesting to know if any of these has been showing up as the "most common" problem.

Andy

[tr0nic]

Very well explained, Andy!

I am so sick and tired of the ATX its not even funny. I was planning on doing the atx->mtx swap however I offered the donor car to Bobkabob and if he backs out i'll still continue with the swap.

Again, very well job in diagnosing the problem!