I have also noticed various Key Fob Not Detected on mine when the battery inside the FOB gets low... I just keep a few extra batteries in my center console. For some reason these fobs seem to chew up batteries.
2011 SRT/8, 392, M6, Toxic Orange, Viper Alarm w/GPS, Custom Pioneer/Rockford/JLAudio/Kicker, CORSA Xtreme, Trinity Tuner, AirAid, HID Fogs, Front & Rear Cameras, Speedlogix Catch Can, Billet Dress Up Kit, 180 stat, Skip Shift Eliminator, Hurst Shifter, and Magnaflow Mids. // 422.37hp, TQ 418.45