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2011 Porsche Cayenne - traction control coming on around 75 MPH on highway going around broad turns

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1 hour ago, Charles Andersen said:



I have a 2011 Porsche Cayenne V6 Stick shift.  Recently, the traction control has started coming on around 75 MPH on highway going around broad turns.  The car also seems to be rolling a bit more in turns.  Does this sound like a faulty sway bar or something like that?  Thanks!


I don’t think it is traction control, more likely stability management (read yaw control).  Start by checking your tire pressures to see if one or more is unusallly low.

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58 minutes ago, Charles Andersen said:

All tire pressures good.  Traction control light flashes on the dash and car feels like it is swaying/rolling at highway speeds.


Traction control operates on the basis of different tire rotational speeds, hence my question about air pressure levels, which can trigger the system, as can differences it tire diameters caused by wear or mismatch tires.  My suggestion would be to put a Porsche specific scan tool in the car and take it for a ride, watching what the system is doing when the problem occurs.  You can also set the diagnostic tool to capture real time data to look at later.

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26 minutes ago, Charles Andersen said:

tire pressure set to PSIs stated on door sticker, so I don't see that as the issue.


Will take it to the shop this week and report back what they find.  Thanks for the suggestions. 


Take a close look at the tires to see if one looks more worn that another, sometimes small differences it diameter trigger these reactions.

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