Question about 1997 Pontiac Sunfire
The only Diagnostic code that shows up is PO742 ( torque converter circuit stuck on. How would I fix it?
TCC silonoid.. torque converter control... seems simple but you gotta drop the front subframe to get the side panel cover to but it in....
Posted on Aug 25, 2008
If you know that the torque converter is actually working correctly, I would unhook the battery which will then erase the memory on your computer diagnostic codes and re-check. If the code does not pop back up again when you try to diagnose any engine problems, you have reset the computer, it will also indicate that the torque converter is fine and all you did was pull up a faulty code.
Posted on Aug 07, 2008
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Posted on Jan 02, 2017
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Jun 19, 2012 | 2000 Buick Park Avenue
Trouble Code: P0742 This should be looked at by a trusted transmission shop in your area to address this problem. This sometimes does require the replacement of the torque converter itself.
Torque Converter Clutch Circuit Stuck On (4T65-E)
TCC PWM solenoid valve for the fluid exhaust is restricted TCC regulated apply valve is stuck in the TCC apply position TCC control valve is stuck in the TCC apply position TCC feed limit valve is stuck (i.e., the TCC feed limit pressure, and the TCC release pressure to be low or nonexistent) Pressure regulator valve is stuck TCC fluid circuits leaking or abnormally low/high line pressure TCC release switch circuit is shorted to ground TSB 00-07-30-007A contains a repair procedure for this code
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