What Fault Does a Continuously Illuminated Engine Warning Light Indicate?

[LilyMarie]

There are many possible reasons for a continuously illuminated engine warning light. Common fault causes include: False Fault: A fault code is reported, but the engine operates normally. This may occur when an operation temporarily exceeds the computer's control range, causing the system to feedback a fault code. The code can be cleared first, then observe whether it reappears. Minor Fault: The engine shows no particularly obvious malfunction, but diagnostic computer readings and further inspections reveal an actual existing fault that doesn't affect normal driving or has minimal impact. Such faults should be identified and addressed promptly. Examples include intake pressure sensor failures. Major Fault: These faults can be detected through visual inspection and driving experience, significantly affecting engine performance and requiring immediate repair. For instance, noticeable engine power loss may indicate oxygen sensor issues.