Q
do bad spark plugs cause check engine light
I'm a seasoned industrial engineer with a keen interest in machine learning. Here to share insights on latest industry trends.
Yes, bad spark plugs can indeed cause the check engine light (CEL) to illuminate. Spark plugs are crucial for the ignition system, igniting the air/fuel mixture in the engine's combustion chambers. When spark plugs are worn, fouled, or damaged, ignition misfires can occur, leading to inefficient engine performance, increased emissions, and potentially triggering the CEL. Modern vehicles' onboard diagnostics systems (OBD-II) continuously monitor engine performance and emissions systems. Misfires significantly affect engine efficiency and emissions, prompting the OBD-II system to turn on the CEL as a warning. Regular maintenance and timely replacement of spark plugs, based on the manufacturer's recommendations, are essential to prevent such issues and maintain optimal engine performance.
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