Instead of resetting the light, you need to diagnose and fix the underlying issue. Here's what you should do:
1. Get the Diagnostic Trouble Code (DTC): This is the most crucial step. The CEL is triggered by a DTC stored in the vehicle's computer. You can get this code in a few ways:
* OBD-II Scanner: This is the best option. You can buy a relatively inexpensive OBD-II scanner at most auto parts stores. Plug it into the OBD-II port (usually under the dashboard) and it will read the DTC code(s). The code will be a number, such as P0171 or P0420. This number is key to understanding the problem.
* Auto Parts Store: Many auto parts stores will read the code for free. Just bring your Jeep in and they'll plug in their scanner.
2. Research the DTC: Once you have the code, search online (e.g., Google the code) to find out what it means. Websites like OBD-II.com are helpful resources. This will tell you the likely cause of the CEL.
3. Fix the Problem: Depending on the DTC, the fix could be simple (e.g., replacing a loose gas cap) or complex (e.g., replacing a sensor or performing a major repair).
4. Clear the Code (After Repair): *Only after you've addressed the issue causing the CEL* should you clear the code. You can do this with your OBD-II scanner. Many scanners have a "clear codes" or similar function. After clearing the code, drive the vehicle for a few days or drive cycles to see if the light returns. If it does, the problem hasn't been fixed.
Important Considerations:
* Don't just disconnect the battery: While disconnecting the battery for a while will sometimes temporarily clear the CEL, it won't fix the underlying problem. The light will likely return.
* Professional Mechanic: If you're not comfortable diagnosing and repairing the issue yourself, take your Jeep to a qualified mechanic.
In short, resetting the check engine light without addressing the root cause is a temporary fix that could lead to bigger problems down the road. Focus on finding out *why* the light is on and fixing that.
