Did your check engine light come on due to spark plug o r ignition coil issues?

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Did your check engine light come on due to spark plug o r ignition coil issues?

Faulty plugs can cause the ECU to detect misfire codes, turning on the warning light. Has your mechanic confirmed that the warning light was linked to spark plug failure?

Lubaba asked on 07 Aug 2025 15:39:03 pm

1 Answer

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Car Mechanic Expert - on 07 Aug 2025 15:42:17 pm

Yes, some users reported a check engine light CEL that, when scanned, showed misfire-related error codes like P0300–P0304. These were traced to fouled spark plugs o r failing ignition coils. Replacing the spark plugs and, in some cases, the coil pack cleared the CEL.