WHERE IS TORQUE CONVERTER CLUTCH SOLENOID LOCATED AT ON BUICK LESABLE CODE PO742

Yes, it is a Transmission code: PO742 Torque Converter Clutch Circuit Stuck On

P0740 - Torque Converter Clutch Malfunction
Possible causes- Low transmission fluid level
- Dirty transmission fluid
- Faulty torque converter clutch solenoid valve
- Torque converter clutch solenoid valve harness or connectors
- Torque converter clutch solenoid valve circuit is open or shorted

Hi, The PO742 is a transmission code representing the Torque Converter Clutch (TCC) release switch. To throw this code, there is either an electrical, mechanical, or hydraulic issue.

If you are extremely mechanically inclined, you will need to check the TCC solenoid, verify the connections of internal wiring harness, and perform an overall diagnosis of the transmission's condition, which will require removal of the transmission.

Given that you have a 4T65-E Transmission I would highly recommend taking it to a good transmission shop, this is not a 'quick' fix issue. Good luck and Godspeed.

P0141: o2 sensor heater circuit.
P0306: cylinder 6 misfire detected.
P0742: torque converter clutch solenoid circuit stuck on.
P1404: EGR valve stuck closed.

The code means that the Torque Converter Clutch (TCC) in your transmission is staying engaged after the computer has commanded it off. This could be caused by a sticking TCC Solenoid, By internal hydraulic pressure leakage, by a faulty Turbine Speed Sensor Circuit, or a faulty Powertrain Control Module.

If your engine has been stalling when you come to a stop - especially after getting off of the highway, then you probably have a sticking TCC Solenoid.

This really needs to be diagnosed properly to keep from spending a bunch of money on parts unneccessariily.

The code PO742 indicates the torque converter clutch is stuck on.
The torque converter is what connects the engine to the transmission.
It engages and disengages according to signals from the pcm, to aid in
smooth shifting. There are a couple of things you can try. make sure trans. fluid is full, if thats ok check the 20 pin connector, located on left
side of car on top of transmission bell housing. Make sure there's no
corrosion or bent pins. If this clears the code your all set, if not you may
want to ask your mechanic and see what he/she recomends.
Hope this helps.
Good luck

The torque converter clutch is stuck on,is the exact code,the solenoid is most likely bad.

"Torque converter clutch" solenoid is stuck open which is causing your bucking problems. The solenoid is either disconnected or faulty. if you ran over something, it may have damaged the wiring, but if not, you need to take it in for checkup.

TORQUE CONVERTER CLUTCH SYSTEM STUCK ON.PROBLEM COULD BE PRESSURE REGULATOR VALVE IS STUCK.OR THE TCC FLUID CIRCUITS LEAKING OR ABNORMALLY LOW HIGH LINE PRESSURE.OR THE TCC RELEASE SWITCH CIRCUIT IS SHORTED TO GROUND.CHECK TRANSMISSION FLUID LEVEL.IF TRANSMISSION FLUID LOOKS REAL DARK LOOKING AND SMELLY .CHANGE THE FLUID AND FILTER.IF THIS DONT HELP ! YOUR PROBLEM COULD BE A BAD TORQUE CONVERTER CLUTCH SOLENOID OR INTERNAL DAMAGE INSIDE TORQUE CONVERTER.OR RESTRICTION IN OIL PASSAGES AND STOPPED UP OR BLOCKED TCC SCREEN.

evap emission control system fault-po441, po742 is--torque converter curcuit stuck on, for this code, check torque converter clutch switch..