Here's what you need to do:
1. Don't panic: While it's important to address the issue, a check engine light doesn't always indicate a serious problem.
2. Read the code: To understand the problem, you'll need to have the code read by a mechanic or use an OBD-II scanner. This will tell you exactly what the computer detected.
3. Address the issue: Once you know the code, you can take steps to resolve the problem. This might involve a simple repair, like replacing a sensor, or a more complex repair, like fixing a leak in the exhaust system.
Possible reasons for a check engine light in a 1999 Toyota Camry:
* Loose gas cap: This is a common cause of a check engine light. It can be easily fixed by tightening the gas cap.
* Faulty oxygen sensor: Oxygen sensors monitor the amount of oxygen in the exhaust and can fail, causing the check engine light to come on.
* Catalytic converter issue: A malfunctioning catalytic converter can lead to a check engine light.
* Spark plug problems: Worn or fouled spark plugs can also trigger the light.
* Air intake leak: A leak in the air intake system can affect the engine's performance and cause the light to come on.
* Mass airflow sensor malfunction: This sensor measures the amount of air entering the engine and can fail, triggering the light.
* Fuel pressure regulator issues: Problems with the fuel pressure regulator can cause the check engine light to come on.
Note: The specific cause of the check engine light will depend on the code that is stored in the computer. A mechanic can help you diagnose the problem and make the necessary repairs.
