code P0301 cylinder 1 misfire on 2007 Chevrolet HHR

Is this a common problem? an expensive fix or does the powertrain warranty cover this? The car is running very rough if moving or parked, service engine light is solid not flashing

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1 answer
This will covered under your emissions warranty. You can learn more about the code here: http://repairpal.com/OBD-II-Code-P0301