Here's the proper way to handle a CEL:
1. Diagnose the Problem: The CEL is a symptom, not the problem itself. You need to find out *what* triggered the light. This requires using an OBD-II scanner. These are inexpensive and readily available at auto parts stores and online. The scanner will read the diagnostic trouble codes (DTCs). These codes provide clues about the malfunctioning system (e.g., oxygen sensor, mass airflow sensor, etc.).
2. Address the Underlying Issue: Once you know the DTCs, you can research the likely causes and potential solutions. This might involve:
* Simple Fixes: Sometimes, it's something as easy as tightening a loose gas cap (a common cause of a CEL).
* Part Replacement: More often, it requires replacing a faulty sensor, component, or performing more involved repairs. This may require a mechanic's expertise.
* Professional Diagnosis: If you're not comfortable diagnosing and repairing the problem yourself, take your van to a qualified mechanic.
3. Clear the Code (After Repair): *Only* after you've addressed the problem causing the CEL should you clear the code. Your OBD-II scanner will have a function to clear the codes. After clearing the codes, drive the van for a while. If the problem is truly fixed, the CEL will stay off. If it comes back on, the problem wasn't solved, and you'll need to repeat the diagnostic process.
WARNING: Simply clearing the code without fixing the underlying problem is dangerous and could lead to significant engine damage. The CEL is there for a reason; it's a warning signal that needs attention.
