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Q:

code P0301 cylinder 1 misfire on 2007 Chevrolet HHR

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
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
(1) Answer
This will covered under your emissions warranty. You can learn more about the code here: http://repairpal.com/OBD-II-Code-P0301