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2012 CTS performance sedan
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Discussion Starter #1
Traction control light comes on and says running at reduced power. What does that mean
 

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Traction control light comes on and says running at reduced power. What does that mean
Do you also have a CEL (check engine light)?
A quality scanner will tell the story.
 

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2010 CTS4 sedan
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768 Posts
With AWD it is probably a WSS but agree a good scanner will tell you what and which.
Agreed that a scanner (that does ABS codes) is required (or a trip to Autozone). Could be a sensor, could be a hub, could be the BCM, could be a steering position sensor, could be a lot of things. Pulling the codes is required to really know.

I've replaced three hubs on my '10 CTS and two wheel speed sensors and I never got a "reduced power" message.
 
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