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

Some Cadillac XT5 owners report experiencing rough idling accompanied by a check engine light, often caused by issues such as vacuum leaks, spark plug problems, or failing ignition coils. Additionally, emissions issues and sensor failures can trigger the check engine light. Owners are advised to check for OBD II codes when the check engine light is illuminated and inspect components like the air filter, vacuum hoses, and spark plugs for visible problems. The check engine light can indicate a range of issues, from minor concerns like a loose gas cap to more serious problems such as engine misfiring, making it crucial to address it promptly to prevent potential vehicle damage and maintain optimal performance. Some owners also note that rough idling may coincide with warnings like service traction control and stabilitrak lights, suggesting the need for a diagnostic scan to identify the underlying issues.