Some Cadillac ATS owners report experiencing cruise control malfunctions despite the indicator light being on, which may be attributed to several underlying issues. These owners have noted that a failed control module, sensor, or switch related to the cruise control system could be the cause. Additionally, throttle actuation problems, such as a faulty throttle position sensor, may lead to engine overcompensation, resulting in black exhaust from the tailpipe. Some owners also report that a malfunction in the adaptive cruise control system can trigger the "Reduced Engine Power" warning light, signaling a need for immediate attention. Furthermore, the presence of the "Traction Control" light may indicate an active traction control system or a malfunction that requires expert inspection if it remains illuminated. To address these issues, it is recommended that owners have the control module, sensors, and switches checked, ensure the throttle position sensor is functioning properly, and seek professional assistance for any adaptive cruise control problems. If the "Traction Control" light persists, consulting an expert is advisable to identify and rectify any potential malfunctions.
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