Why is the check engine light on in my Mazda CX-5 KF, and what are the potential error codes?

When the check engine light (CEL) illuminates on your Mazda CX-5 KF (2017-2024), it indicates that the vehicle's onboard diagnostics system has detected an issue that requires attention. Here’s a detailed step-by-step guide to diagnose and address the issue.

Parts/Components That May Need Replacement:

• Oxygen sensors (if faulty)
• Mass Air Flow sensor (if dirty or damaged)
• Fuel injectors (if clogged)
• Vacuum hoses (if cracked or leaking)
• Catalytic converter (if damaged)

Estimated Time for Repair/Maintenance:

• Scanning and Diagnostics: 30 minutes
• Visual Inspection and Fluid Check: 30 minutes
• Component Replacement (if needed): 1-3 hours, depending on the part and complexity of the repair.

Safety Warnings:

• Always ensure the vehicle is turned off and the keys are removed before performing any inspections or repairs.
• Use gloves and safety goggles when handling automotive fluids or components.
• If working under the vehicle, ensure it is securely supported with jack stands.

By following these steps, you can effectively diagnose the cause of the check engine light on your Mazda CX-5 KF and take appropriate action to resolve the issue. If you are not comfortable performing these diagnostics or repairs, it is advisable to consult a professional automotive technician.