While some auto parts stores offer free diagnostic code readings, these readings often provide only a general indication of the issue. For accurate diagnosis and proper repair, it’s recommended to visit a certified Cadillac service center equipped with specialized diagnostic equipment and expertise.

Common reasons include issues with the oxygen sensor, catalytic converter, spark plugs, ignition coils, mass airflow sensor, or fuel cap. However, there are numerous potential causes, so a proper diagnostic check is necessary for accurate identification.

While it’s possible to reset the check engine light using an OBD-II scanner, simply clearing the code without addressing the underlying issue won’t fix the problem. It’s crucial to diagnose and repair the root cause to prevent the light from coming back on.

The warranty coverage depends on the specific terms outlined in your Cadillac warranty. Generally, if the issue is covered under warranty and not caused by neglect or modification, the repair should be covered.

Regular maintenance, including timely oil changes, replacing spark plugs, and following the manufacturer’s recommended service schedule, can help prevent many common issues that trigger the check engine light. Additionally, addressing any warning signs promptly can prevent minor issues from developing into larger ones.