Cadillac XT5 check engine light with rough idling issue on Cadillac XT5

Some Cadillac XT5 owners report experiencing issues with rough idling accompanied by a check engine light, which may be caused by factors such as vacuum leaks, spark plug problems, or failing ignition coils. These owners note that the check engine light can indicate a range of issues, from minor concerns like a loose gas cap to more serious problems like engine misfiring. Many recommend starting diagnostics by checking for OBD II codes and inspecting components like the air filter, vacuum hoses, and spark plugs. Additionally, the appearance of the service stabilitrak light alongside the check engine light may also relate to rough idling concerns. To effectively resolve these issues, it is advised that owners address potential problems with the engine intake, electrical system, and other sources contributing to rough idling.