Here's the proper approach:
1. Diagnose the Problem: The first step is to determine *why* the check engine light is on. You'll need an OBD-II code reader. These are inexpensive and readily available at auto parts stores. Plug it into the OBD-II port (usually located under the dashboard) and it will retrieve diagnostic trouble codes (DTCs). These codes give you clues about the specific issue.
2. Repair the Problem: Once you have the codes, research their meaning (online or using a repair manual) to understand the problem. Then, repair the faulty component or system. This might involve replacing a sensor, fixing a leak, or performing more extensive repairs.
3. Clear the Code (After Repair): *Only after you've successfully repaired the problem* should you clear the check engine light. Many code readers have a "clear codes" function. Some auto parts stores will also clear the codes for free if you bought the parts from them. After clearing the code, drive the car for a few days or more to see if the light comes back on. If it does, the problem wasn't fully resolved.
Important Considerations:
* Don't just disconnect the battery: While disconnecting the battery for a short time might temporarily clear the light, it won't address the underlying issue and the light will likely return.
* Don't use a generic "reset" tool: These often don't provide reliable results. A proper OBD-II scanner is essential for accurate diagnosis.
* Professional help: If you're not comfortable diagnosing and repairing car problems yourself, take your Lincoln Town Car to a qualified mechanic. They have the tools and expertise to properly diagnose and fix the issue.
Ignoring the check engine light can lead to more significant and costly repairs down the road. Addressing the root cause is always the best approach.
