i know that the torque converter clutch selenoid is inside the trans attached to the valve body. You have to drop the pan and pull the valve body to get it off.
P0743-TORQUE CONVERTER CLUTCH SOLENOID/TRANS RELAY CIRCUITS This code will set if the voltage detected on the Torque Converter Clutch Solenoid Control circuit at the PCM is different than the expected voltage.
On a 2004 Chevrolet Silverado in regards to a relay for the torque converter. After very intense research I cannot find anything that says it has a relay. I have never heard of any vehicle having a torque converter relay.
Trouble code P0743 means: Torque Converter Clutch Solenoid Circuit Electrical Trouble code P0747 means: Pressure Control Solenoid A Stuck On Trouble code P1624 means: Cooling Fan Relay Circuit Malfunction, Low Circuit
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P0645 AC clutch relay circuit. Possible causes: A/C CLUTCH RLY CIRCUIT WIRING HARNESS OBSERVABLE PROBLEM A/C CLUTCH RLY CIRCUIT WIRING HARNESS INTERMITTENT PROBLEM FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN A/C CLUTCH RELAY CONTROL CIRCUIT OPEN A/C CLUTCH RELAY CONTROL CIRCUIT SHORT TO GROUND A/C CLUTCH RELAY PCM (A/C CLUTCH RELAY)
P0743-TORQUE CONVERTER CLUTCH SOLENOID/TRANS RELAY CIRCUITS
Not sure what a TCC (Torque Converter Clutch) sensor is. There is however a TCC relay and a TCC solenoid. The TCC relay is found in the relay/fuse center and the TCC solenoid is located inside the transmission.
Locks up the torque converter.
first off I'm not sure about 42 but for 37 is a torque converter solinod that is bad. It is located inside the tranny underneath the vavle body.
Code 33 is air conditioning clutch relay circuit An open or shorted condition detected in the a/c clutch relay circuits.
Check the Idle control senser, the torque converter clutch relay or the computer could also be the coil pack. Good luck!
If yours is on constantly or won't come on there are several possibilities. There is a relay, usually inside the transmission, that controls the lock-up solenoid inside the torque converter. If the lock-up won't release, the problem is often that relay. The good part is, it's a lot less expensive than a transmission rebuild and if you can find a reputable transmission shop (that's the bad part, they're difficult to find) they will replace the faulty relay at a reasonable price. On the other hand, it can also be the torque converter, in which case the transmission has to come out and they'll need to replace the torque converter. Then you'll get the speech, "While it's out it's a good idea to..." If it WON'T lock up when going down the road, it can be a sensor, the relay or, yes, the torque converter.