My CEL has never come on to date. I have probably 7000 miles with the FW Catless DP installed. That’s all styles of driving including a few track days and one day at the drag strip. So far the DP has worked as advertised.
Not 100% sure if it is bc of the DP. I haven’t looked into it too much since the CEL popped up. I also have a piggy back tune that may have caused it (only been installed for about 2 weeks). I plan on looking into it more in the near future, it probably isn’t the DP if others haven’t had any issues with it. Thanks for the feedback!