What Causes the Engine Malfunction Light to Illuminate in the Mazda3 Axela?

[McPatrick]

The reasons for the engine malfunction light illuminating in the Mazda3 Axela include poor fuel quality, faulty ignition coils, and poor engine performance. The specific causes are as follows: Poor Fuel Quality: Low-quality gasoline leads to incomplete combustion of the air-fuel mixture in the cylinders, resulting in carbon deposits. Carbon buildup in the intake tract and piston tops causes poor atomization, leading to incomplete combustion and ultimately triggering the engine malfunction light. Faulty Ignition Coils: Excessive engine mileage weakens the spark plugs' performance characteristics. Faulty ignition coils cause poor ignition, leading to incomplete combustion, which also triggers the malfunction light. Poor Engine Performance: Older vehicles with mechanical wear and tear can experience poor engine performance, leading to suboptimal combustion and ignition, which causes the malfunction light to illuminate.