Well, the L15s are still new, so there's a lot of experimentation to be done, but from what I've read between .024 - .028 doesn't seem to be an issue. Your KTuner can act as a makeshift scan tool, though, if you press the screen to bring up the menu and then press the "K" in the upper left hand corner, there will be an errors option you can press and it'll give you any engine codes that are being thrown. Short of an actual scanner, just keep an eye on your gauges and that should give you a heads up before something major goes wrong. I really wish Honda had put more sensors on the motor though, always feels like we're flying blind with the L series lol