Here's what you should do:
1. Diagnose the problem: The first and most crucial step is to find out *why* the CEL is on. You'll need an OBD-II code reader. These are inexpensive and readily available online or at auto parts stores. Plug it into the OBD-II port (usually under the dashboard) and read the trouble codes. These codes will give you a clue about the problem (e.g., oxygen sensor malfunction, mass airflow sensor issue).
2. Fix the problem: Once you know the trouble code(s), research the likely causes and fix the underlying problem. This might involve replacing a faulty sensor, repairing a leak, or addressing a more significant mechanical issue. This is often best left to a mechanic, especially with a vehicle as complex as a 1998 Range Rover.
3. Clear the code (after fixing the problem): *Only* after you've addressed the underlying issue should you attempt to clear the code. Your OBD-II code reader will likely have a function to clear the codes. Some auto parts stores will also clear the codes for free if you bought a part from them.
Important Considerations for a 1998 Range Rover:
* OBD-II Compatibility: While 1998 vehicles *should* be OBD-II compliant, there might be quirks with the Range Rover's system. Ensure your code reader is compatible with older vehicles.
* Complexity: The 1998 Range Rover is a complex vehicle. Diagnosing and repairing problems yourself can be challenging, even with the help of a code reader. Consider taking it to a qualified mechanic, especially if you're not comfortable working on cars.
* Don't just clear the light: Clearing the code without fixing the problem will only temporarily turn off the light. The underlying issue will likely persist, potentially causing further damage.
In short: Fixing the problem is the priority, not resetting the light. The light is a warning signal; ignoring it could lead to significant and costly repairs down the road.
