Why is the check engine light on in my 2019 Toyota Corolla E210, and how can I diagnose it?

When the check engine light illuminates on your 2019 Toyota Corolla E210, it indicates that the vehicle's onboard diagnostics system (OBD-II) has detected a malfunction. Here's how you can diagnose and potentially resolve the issue:

Parts/Components That May Need Replacement:

• Spark Plugs
• Ignition Coils
• Oxygen Sensors
• Mass Airflow Sensor
• Catalytic Converter

Estimated Time for Diagnosis:

• 30 minutes to 1 hour: Depending on the complexity of the issue and the number of components to inspect.

Safety Warnings:

• Engine Components: Be cautious of hot engine parts to avoid burns.
• Electrical Components: Disconnect the battery if working on electrical components to prevent shock or short circuits.

By following these steps, you can diagnose the reason for the check engine light on your Toyota Corolla E210. If you're unable to resolve the issue or if the problem persists, it is advisable to consult a professional automotive technician for further assistance.