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P0301 Cylinder 1 Misfire Detected. Can be bad plug or plug wire. Can also be a burnt valve or head gasket leak. On a 10 year old car, I would replace the plugs and plug wires. If the miss persists, run a compression check on all cylinders. If cylinder 1 is low on compression, suspect a burnt valve unless you are loosing coolant or engine is blowing white smoke. If white smoke or coolant loss is present, suspect a blown head gasket.
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