Cadillac code po741service light on

code p0741 refers to torque converter clutch (TCC) solenoid ---performance or stuck off ===causes --wiring ---TCC solenoid

All you had to do was google PO741

Torque Converter Clutch Circuit Stuck Off

Given the years on the car & any slipping, I think your best to just rebuild it,once they slip your done

The previous owner never changed the trans fluid,no one does,
that's why they fail

it's a trans converter clutch code

Hi,

Code P0741 = Torque Converter Clutch Circuit Performance or Stuck Off. This relates to your transmission only and has nothing to do with Exhaust emmissions.

If failed smog test, there must be an issue within your emmission system, e.g. sensors etc

You will need to have your codes read again, or have your vehicle properly inspected.


Cheers,

Subject:
Service Engine Soon (SES) Light On, Diagnostic Trouble Code (DTC) P0741, Torque Converter Clutch (TCC) Excessive Slip, Transaxle Chuggle, Slip/Surge (Inspect/Replace Internal Transaxle Components) #04-07-30-034 - (08/06/2004)
Models:
1998-2002 Cadillac Eldorado
1998-2004 Cadillac Seville
1999-2004 Cadillac DeVille
2000-2003 Oldsmobile Aurora
there is a write up on this about 3/4 page down.

http://www.cadillacforums.com/forums/cadillac-forum/t-107360.html

code P0135 heated O2 sensor bank 1 sensor 1 , heater circuit ( front O2 sensor driver side ) replace O2 sensor

code P0741 this is a transmission code TCC ( torque converter clutch ) stuck off. most likely you need to replace the TCC switch.

P0741 Torque Converter Clutch Circuit Performance or Stuck Off

This means that the lock up Torque Converter is not locking up as it should at highway speed or 35 mph and up (I learned that figure in school for Oldsmobile automobiles).

It can lead to less fuel efficiency.

Hope this helps.

P0741 Torque Converter Clutch Circuit Performance or Stuck Off

Your car actually has a viscous converter clutch inside the torque converter instead of a (mechanical) torque converter clutch to lock up the torque converter for fuel economy improvement. You will see it referred to as the VCC and/or TCC.....

The TCC/VCC has a variety of components in the system including an electrical circuit supplying the transmission, the apply solenoid inside the trans, the torque converter itself, the PCM that controls the apply, etc. It is impossible to diagnose from afar. Unlikely that it is a "sensor" inside the trans as the PCM controls the VCC apply and uses engine and trans data that it receives from a variety of sources. If a "sensor" had failed the trouble code for that sensor would be setting......

Something as simple as the brake switch can cause the VCC to not apply correctly. There is a safety switch on the brake pedal that activates the brake lights and disconnects the VCC circuit. If it is misadjusted then the trans cannot apply the VCC. Lots of other trouble shooting items on the VCC system. If you don't have a service manual and cannot trouble shoot the system, I would recommend a Cadillac dealer as they have the trouble shooting information for the specific VCC that the Cadillac 4T80E trans has that a trans shop is simply not familiar with. No sense working on the trans until you actually know what is wrong.