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1999 Pontiac Montana

Question: Code PO742, TCC stuck open. Clear code, shifts fine until it warms up. ???

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lilreweldingrod, 3.4L V6, Lancaster, CA, January 15, 2012, 21:14
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When I cleared the codes, the car returned to normal, until it warmed up. start up nothing- turn off and restart works great for 200-300 feet. I think it is electrical or a bad sensor.
All the shops only know one word, rebuild, with no discussion.
Where do I find an honest trans mechanic? I changed the oil and filter and found the pan clean, no shavings or grindings. I just can't believe it needs and overhaul. If it was mechanical, I would have the same problem all the time, Is it the PCM? ISS? OSS? Could it be the computer? Wireing loom?HELP!

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  • Answer #1

    patrick mannion from Greg Solow's Engine Room, January 15, 2012, 23:28
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    P0742 is a torque converter code, I don't have access to the test procedures right now (it could be a bad solenoid or wiring issue) but there is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate http://bit.ly/AllData_Repair_Manuals_Online

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    lilreweldingrod, January 16, 2012, 07:58
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    Thank you! I just joined.

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