Here's the proper way to handle a check engine light:
1. Get the Diagnostic Trouble Code (DTC): This is the most crucial step. The check engine light itself doesn't tell you *what* is wrong. You need to retrieve the Diagnostic Trouble Code (DTC). You can do this in a few ways:
* OBD-II Scanner: The cheapest and easiest option is to buy a relatively inexpensive OBD-II scanner from an auto parts store. These plug into your car's OBD-II port (usually under the dashboard) and will read the DTCs. Many auto parts stores will also scan your car for free.
* Auto Parts Store: As mentioned, most auto parts stores will scan your car for free and give you the code(s). They might even offer suggestions based on the code, though take that advice with a grain of salt.
* Mechanic: A mechanic will have professional-grade scanners and the expertise to interpret the codes and diagnose the problem. This is the most reliable, but most expensive, option.
2. Interpret the DTC: Once you have the code(s), you can look them up online (many websites offer DTC lookup tables) or in a repair manual specific to your 1997 Toyota Camry CE. This will give you a better idea of what the potential problem is.
3. Fix the Problem: Based on the DTC and your interpretation, you can try to fix the problem yourself (if you're mechanically inclined and have the right tools) or take your car to a mechanic. Common causes for a check engine light include:
* Loose gas cap: Believe it or not, a loose or faulty gas cap is a frequent culprit. Try tightening it and see if the light goes off after a few driving cycles.
* Oxygen sensor: A faulty oxygen sensor is another common issue.
* Mass airflow sensor: This sensor measures the amount of air entering the engine. A faulty sensor can cause poor performance and trigger the check engine light.
* Spark plugs and wires: Worn-out spark plugs or faulty ignition wires can also cause the light to come on.
* Catalytic converter: This is a more expensive repair.
4. Clear the Code (After Repair): Once you've fixed the problem, you can clear the code using your OBD-II scanner. The light should stay off if the repair was successful. If the light returns, there's likely still a problem that needs addressing.
Important Note: Simply disconnecting your battery or using a code clearer without fixing the underlying problem is a temporary solution at best. The check engine light will likely return, and the problem could worsen, leading to more significant damage and potentially expensive repairs. Address the root cause of the problem, not just the symptom (the light).
