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 onboard diagnostic (OBD-II) system. You need this code to understand *why* the light is on. You have a few options:
* OBD-II Scanner: The best option is to use an OBD-II scanner, which you can buy relatively inexpensively at most auto parts stores. These scanners will read the DTC and often provide a description of the problem.
* Auto Parts Store: Many auto parts stores will read the code for free. Just bring your Jeep in.
2. Address the Problem: Once you know the DTC, you can research the potential cause(s). This might involve:
* Simple Fix: Sometimes it's something simple like a loose gas cap. Tighten it and see if the light goes off after a few drive cycles.
* Repair or Replacement: More often, it's a more serious issue requiring repair or replacement of a faulty sensor, component, or system. You might need to take it to a mechanic.
3. After Repair, Clear the Code (If Necessary): *Only after you've addressed the underlying problem* should you clear the code. Many OBD-II scanners have a code clearing function. Again, some auto parts stores will do this for free.
Do NOT attempt to reset the CEL without first identifying and addressing the underlying problem. Ignoring it could lead to more serious and costly damage down the line. A simple loose gas cap is the only exception, and even then, you should monitor the light to ensure it stays off.
