Hey y’all! My daughter’s 2015 Cruze started running rough, the check engine light came on of course along with Service Stabilitrak and Service Reaction Control warning on the info center. It was throwing codes P0137, P2270, P2301 and P0300. 2 codes suggested misfires and the other 2 said the O2 sensor. I spoke to a dealer and they said it sounded like the coil pack. I got a new one and after installing it, the car won’t start. I have also seen videos mentioning the PCV valve. Any help would be greatly appreciated.