Can a failing spark plug cause the Honda Citys engine check light to turn on?

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Can a failing spark plug cause the Honda Citys engine check light to turn on?

What error codes such as P0300-P0304 are associated with spark plug issues, and how can they be diagnosed?

Sandeep asked on 27 Feb 2025 12:50:51 pm

1 Answer

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Car Mechanic Expert - on 27 Feb 2025 14:11:32 pm

Yes, a faulty spark plug can trigger the Check Engine Light CEL.

Error codes: The most common error codes related to spark plug failure include:
P0300: Random/Multiple Cylinder Misfire Detected.
P0301–P0304: Cylinder-specific misfire e.g., P0301 refers to cylinder 1 misfire.
Diagnosis: A mechanic can use an OBD-II scanner to retrieve these codes and pinpoint which cylinder is misfiring, helping to identify the issue with the spark plug.