Hello everyone, having an issue with my 2000 Chevy Blazer. It was running just fine Then the engine started running rough, I could feel the misfire. The following codes came up . C0308 motor A/B circuit low , P0102 mass airflow sensor. P0300 and the P 0301 misfire cylinder number one. I could not find anything on C0308 anyone have an idea what that means?