Illumination of the Check Engine Light can be caused by a loose or worn gas cap.
Problems for specific Cadillac CTS years:
Car problem reports
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Most reported 2008 Cadillac CTS problems
The steering wheel position sensor may fail, resulting in the service stability message being displayed.
The front and rear light bulbs are prone to premature failure. Our technicians tell us that the front bulbs can be very difficult to replace.
Vehicles with certain V6 engines may illuminate the Check Engine Light one or more of the following codes: P0011, P0014, P0021, P0024, P0341, P0346, P0336, or P0391. Our technicians tell us that some vehicles may require a powertrain control module (PCM) software update to correct this issue. Other vehicles may have excess camshaft end play on one or both cylinder heads which will need to be corrected using special procedures outlined by GM.