1. Clearing DTCs with the On-Board Diagnostics (OBD) System:
* Method A: Driving Cycle: Sometimes, simply driving the car for a certain period (often 50-100 miles) under varied driving conditions (city and highway) will cause the car's computer to clear minor, temporary codes. This doesn't work for all codes, and isn't a reliable method.
* Method B: Using an OBD-II Scanner: This is the most reliable method. You'll need an OBD-II scanner (available at most auto parts stores). These scanners plug into the OBD-II port (usually under the dashboard) and allow you to read and clear trouble codes. The scanner will typically have a button or menu option to clear codes. *After clearing codes, be sure to note the codes before you clear them in order to understand what issues the car might have.*
2. Resetting Specific Systems (Less Common):
Some Cadillacs might have specific procedures to reset individual systems (like the infotainment system or the tire pressure monitoring system), often involving holding down buttons on the system's controls for a certain amount of time. Consult your owner's manual for instructions specific to your Cadillac model and year.
3. Professional Diagnostics and Repair:
If you're encountering persistent trouble codes or don't feel comfortable using an OBD-II scanner, take your Cadillac to a qualified mechanic or dealership. They'll be able to properly diagnose the problem and repair it, clearing codes as part of the service.
Crucial Note: Simply clearing codes *without addressing the underlying problem* won't fix the issue. The check engine light (or other warning lights) will likely come back on. Clearing codes is a diagnostic tool, not a repair. Always try to determine *why* a code appeared before clearing it. Refer to your owner's manual or a repair manual for the specific codes and what they mean.
