The R12a I used said it was compatible with most types of other refrigerants, including R134.

After looking up those error codes, I saw one was the temperature reader or thermostat. It would make sense if that is failing since The car blows warm air only if its been in the sun. It still blows cold air if I have left it parking underground somewhere or even on a cloudy day with no sun boiling the car. The car probably cant read the temperature of the exterior air coming into the system properly.

Thats just my assumption though...I could be (and probably am) very wrong haha.