I have an 07 Chevy Aveo ls. I have recharged the Freon in it but won’t blow cold. It does blow slightly cooler air than the outside temp when moving but when stopped it’s hot hot. I also have gotten the code p0300 right after putting in a new cpu. I just replaced the camshaft position sensor and the spark plugs and wires were replaced in March/April. I’ve done an injector clean as it was suggested on the report for the code but it did nothing. I would like to fix the issues myself rather than a mechanic.
Realize that those are one of the worst cars Chevy ever made but actually I believe they come from Korea or somewhere. You got random misfire I'd start by fixing that because if that code trips it may shut the AC off or you might just be low on refrigerant for the AC not working you probably have more than one problem. Start with a tune-up
