Po742a code torq converter clutch circuit stuck on, this only happens afetr long periods of driving how do i fix and any idea how much it will cost? it is on a 1999 grand prix gtp with a 3.8 super charged

Code P0741 is a diagnostic trouble code (DTC) that indicates a problem with the torque converter clutch (TCC) circuit in a vehicle's automatic transmission system. The TCC is a hydraulic clutch that allows the engine to continue running while the vehicle is stopped, and it also helps to improve fuel efficiency when driving at highway speeds.
There are several potential causes for a P0741 code, including:

• Failed torque converter clutch solenoid
• Wiring issues, such as damaged or corroded wires
• Failed torque converter clutch
• Failed transmission control module (TCM)

To fix a P0741 code, it will be necessary to diagnose the specific cause of the problem and then perform the appropriate repair. This will typically require the expertise of a trained mechanic, as working on a vehicle's transmission system can be complex and requires specialized tools and knowledge.
If you are experiencing a P0741 code on your vehicle and are unsure how to proceed, it is recommended to take your vehicle to a mechanic or dealership for diagnosis and repair. They will be able to identify the specific cause of the problem and provide the necessary repairs to fix the issue.

P0741- Torq Conv Clutch Circ Perf/Stuck Off
Looks like the torque converter clutch circuit is in the off position causing the car to stall. But as I read this again I can see you know that. I would check or change the tcc switch on the tranny to start. I believe it is on the rear of the tranny.

This code refers to a faulty torque converter clutch solenoid valve which is located in the transmission ( pan ). The code can be set if the transmission fluid is low/dirty causing the valve assembly to gum up and stick. The code can also be set if the valve is defective or the wiring to it has a problem. The most common problem is a bad valve

Go here - www.jeepforum.com/forum/f11/tech-faq-links-tsbs-89273/ - and find the AW-4 Service and Diagnostic Manual. Looks like you need to test some solenoids.

P0740 (M)Torq Con Clutch, No RPM Drop at Lockup. Relationship between engine and vehicle speeds indicated failure of torque convertor clutch lock-up system (TCC/PTU solenoid)
P0743 (M)Torque Converter Clutch Solenoid/ Trans Relay Circuits. An open or shorted condition detected in the torque convertor clutch (part throttle unlock) solenoid control circuit. Shift solenoid C electrical fault - Asin transmission
P0743 (M)Torque Converter Clutch Solenoid/ Trans Relay Circuits. An open or shorted condition detected in the torque convertor part throttle unlock solenoid control circuit (3 or 4-speed auto. trans. only).__________________
.
Rather than banning scary looking black semi-automatic sporting firearms, why don't we
identify and treat the nut jobs pulling the triggers, and put the criminals in jail ?

Ok, The other day I had a "service Engine Soon" light. The car was shifting really hard, and slamming into each gear. I have found that if I pull over, take my code reader and plug it in, I get a PO742 code. Torque converter circuit stuck on. I proceed to erase that code from the computer, and restart the car and it will run and drive totally fine, as if nothing is wrong. I have been doing it this way for 3 years and the car is running fine to this day. It hasn't cost me a dime in repairs, and I commute 500 miles/week. It's worth a try, because I have heard that if you spend 800-900 bucks to get it "fixed", the problem WILL return some day.

P0420 catalytic below threshold,Your basically dealing with is a failed catalytic ,
P0742 Torque convertor clutch circuit stuck on or off.
P1811 this is manufacutrer code definition adaptive shift (due to P0742)
P1811 this code is set from towing a trailer in overdrive
when P0742 comes on it usually is accompanied by P1887
If its p1811 then yes it truly is a TCC solenoid being a problem As for catalytic code te catalytic is a mechanical device and yes they do expire from mileage and age

the torque converter clutch circuit is inside the torque converter and is not something u can repair, the torque converter must be cut apart and rebuilt by companies who specialize in this, so all you can do is pull the transmission out of the car and replace the torque converter with a rebuilt or new unit.

the torqe converter goes on the transmission somewhere and you might need to have it fixed by it just have been worn out, and if it's 2 wheel drive, it's in the bac usually

This problem will cause car to stall either in gear and not moving and coming up to stop.To fix side cover of trans will need to be removed and new sensor put in for lock up torq converter..Hope this helps you And Have A Great day

I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_a3369546f8067589