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CEL - codes P0300, 0303, 0035

are these for faulty spark plugs? Thanks!

sorry, last DTC is: P0305…

These DTC (Diagnostic Trouble Codes) are for misfire in general (P0300), #3 cylinder (P0303), and #5 (P0305) cylinder. Yes, replace the spark plugs, disconnect the battery for 2 minuets (to erase the codes), and give it a drive. If / when the check engine light comes on, read them again, and give us another “call”.