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1994 concours, 1996 deville, 1997 deville, 2006 STS V8
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Discussion Starter #1
I have a 1994 deville concours with the northstar engine, and when ever i go about 50mph or faster my ses light comes on. The only code i pull is the p039 history. Does any one how i can get rid of it thanks.
 

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13 Challenger RT, 11 CTS Coupe Premium, 94 Eldorado (RIP)
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1,306 Posts
p039 - Torque Coverter Clutch/Viscous Converter Clutch Engagement Problem

You trans is getting slippage during high engine load. The PCM monitors engine rpm and vehicle speed and compares them. A code will set when the engine speed exceeds a predetermined value for the current vehicle speed.

Do a search on the the forums for "TCC" or "P039". This has been touched before. One reason it may be coming up in history is because you are checking codes when you aren't above 50 mph. You can check codes while driving if you are careful not to get too distracted.
 
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