TruckingFrank

I have a 2009 Mack ch613. I just bought it I've never owned a Mack. It has the DPF filters it's got the lightning bolt code as well as sometimes the circle with the X in it. It will not allow me to do a regen. Engine power is good no issues aside from that. It will shut down when idling but never tells you to shut down when going down the road. Those codes never show up when driving or throttled up with cruise set. Any suggestions is it worth taking in to look at?