Professional Oxygen Sensors When your vehicle needs to run in tip top form whether to pass a state emissions test, or just to do the best for the environment you need ACDelco in your corner. Our Professional lineup of Oxygen Sensors, Remanufactured Mass Airflow Sensors and Control Modules will help your vehicle run as efficiently and cleanly as possible. Trust ACDelco to help your vehicle run clean and green. If your Oxygen Sensor is not functioning properly, you are robbing yourself of good performance and costing yourself money at the gas pump. Let ACDelco"s Professional Oxygen Sensors help. Meets the rigorous OBD II standards. Coverage for most of today"s most popular makes and models.