here are the gas readings at 15mph; CO2 12.8, O2 0.0, Hc 219, CO 3.07, Nox 1490 and at 25mph; CO2 12.9, O2 0.0, Hc 168, CO 3.08, Nox 1532 The car runs fine, starts easily. O2 doesn't appear stuck, it does move if the car is revved quickly in neutral but settle... Login to read more.