I'm trying to get set up for some datalogging with the stock O2 sensor, but I can't get AFR readings to show up in the engine data screen or the datalogging screen. It just reads 0 for AFR. Anyone have an insight to what the problem is? I have a Johnny Cheese tune that had the HOX OFF, but I've taken that map and turned it back on, but no luck. Still reads 0. Any ideas?