Q
can spark plugs be bad without 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, spark plugs can go bad without causing the check engine light to come on. The check engine light usually only comes on when there's a significant issue that could seriously impact the vehicle's performance or cause damage. Spark plugs that are beginning to wear out might still be able to ignite the air-fuel mixture in the combustion chamber, just not as efficiently or effectively. As a result, you might notice symptoms like a rough idle, difficulty starting your car, increased fuel consumption, and poor acceleration. However, as the condition of the spark plugs worsens, they may eventually cause the check engine light to come on.
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