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

Asked by for the 2007 Chevrolet HHR
This will covered under your emissions warranty. You can learn more about the code here:
1 answer