Luke Posted April 16, 2015 Report Share Posted April 16, 2015 (edited) Okay, so, my 2006 DTS (currently 165,000 miles) started dinging and saying SERVICE TRACTION CONTROL/SERVICE STABILITRAK every once in a while, about 2 years ago. It wasn't often so I didn't worry too much about it. About 4 or 5 months ago, it started doing it constantly. I have actually known my transmission had been slipping for about a year before the messages started. If punched, it would act like it was popping out of gear then catch. New filters and fluid changed did not fix this problem. I always figured it was the transmission acting up that was causing the messages. So, I had my transmission replaced about 6 weeks ago. I found one from a 2010 DTS with 24k miles and paid $1,870 said and done for transmission, new LOCKUP torque converter, new starter (just in case), fluids, gaskets, and installation. I think I did pretty well! Anyway, the SERVICE TRACTION CONTROL/SERVICE STABILITRAK did not go away. When I picked the car up, it had also developed a rough idle. I've been struggling to find the problem. When the message appears, I get P0171 and P0174. Upon researching, everything on the internet points to a torn intake plenum. My guess is that when they had the intake off, they did not notice a tear in the plenum and removing and installing it made the problem worse. Here is my question.... everything I have found on the internet and on caddyinfo talks about the plenum leaks on 2000-2005 DeVilles but never have I found a mention of the problem on 2006+ DTS. Has anyone ever heard of this happening on 2006+ DTS? BTW, even though the installation of the brand used transmission didn't fix the problem, I am happy I had it done. The transmission no longer slips. It shifts BEAUTIFULLY (when the SERVICE TC/STABILITRAK messages aren't present) and should last me many years to come! Other than these problems, this car has been such a great car and I intend to drive it for the forseeable future since the STS-V is not my daily driver. Edited April 16, 2015 by Luke Texas Jim 1 Quote Link to comment Share on other sites More sharing options...
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