Hi, I'm working on a dd15 the dpf ash clean code came on, i sent the filter to get cleaned, the truck has 320xxx miles. I tried to reset the dpf ash accumulator but it get me an error (can remember exactly what the error was, but it said something like the cpc exceded the milage....... sorry) I typed in the dpf serial number like it asked me. I have d d dl 7.06 read and write level at 15. Can someone please help me. Thanks.