Here's the proper way to handle a Check Engine Light:
1. Diagnose the Problem: The CEL is a symptom, not the problem itself. You need to find out *why* the light is on. The most reliable way to do this is with an OBD-II scanner. These are relatively inexpensive and can be purchased at most auto parts stores. The scanner will read the diagnostic trouble codes (DTCs) stored in your vehicle's computer. These codes provide clues about the specific issue.
2. Fix the Problem: Once you know the DTC(s), you can address the underlying problem. This might involve replacing a faulty sensor, fixing a leak, or addressing a more significant mechanical issue. Do not simply clear the code without addressing the problem; the light will likely come back on.
3. Clear the Code (After Repair): After you've repaired the problem that triggered the CEL, *then* you can clear the code. Many OBD-II scanners have a "clear codes" function. Some advanced scanners allow you to erase specific codes. You can also try disconnecting the battery's negative terminal for 15-20 minutes. This might work, but it's less reliable than using a scanner. However, remember that this only clears the code; it doesn't fix the problem.
Important Considerations:
* Professional Mechanic: If you're uncomfortable diagnosing and repairing car problems yourself, take your Sonoma to a qualified mechanic. They have the tools and expertise to properly diagnose and fix the issue.
* OBD-II Scanners: There are various types of OBD-II scanners, from basic code readers to more advanced diagnostic tools. Choose one that suits your needs and technical ability.
Simply clearing the Check Engine Light without fixing the problem is a bad idea. It could lead to further damage to your vehicle or even safety hazards. Always address the underlying cause before clearing the code.
