Here's what you need to do:
1. Diagnose the Problem: The first, and most important step, is to find out *why* the light is on. You can do this in a few ways:
* OBD1 Scanner: A dedicated OBD1 scanner (for your year Lumina) is the best option. These scanners read the diagnostic trouble codes (DTCs) stored in the car's computer. The DTCs will give you a clue about what's wrong. OBD1 scanners are relatively inexpensive.
* Auto Parts Store: Many auto parts stores will scan your car's computer for free (or for a small fee). They can tell you the DTCs and potentially suggest solutions.
* Professional Mechanic: If you're uncomfortable diagnosing the problem yourself, a mechanic is the best option.
2. Fix the Problem: Once you know the DTC, you can address the underlying issue. This could be anything from a loose gas cap to a more serious problem like a faulty sensor or emissions component. Do not ignore the check engine light. Driving with a problem can damage your engine and potentially lead to expensive repairs.
3. After Repairing: *After* you've fixed the problem, there are a few ways to potentially clear the code:
* Disconnect the Battery: Disconnect the negative (-) battery terminal for about 15-20 minutes. This will often clear the code, but it's not guaranteed to work on all OBD1 systems. Reconnect the battery and see if the light has gone off.
* OBD1 Scanner: Some OBD1 scanners also have the capability to clear codes. This is the more reliable method than disconnecting the battery.
Important Note: Simply disconnecting the battery or using a generic reset method *won't fix the underlying issue*. If the problem persists, the check engine light will return. Always diagnose and fix the root cause before attempting any reset.
