Getting this consistently on my 19 258. DX3, shows inactive when scanning, but turtle light appears and wont regen. Clear codes, clear DPR reset, Run a Force Regen and it only lasts 1 min and says its done. Any ideas? Clears and then you can drive for 1-5 days and its back. Dealer has been 0 help. Anyone? Need a little help before I decide to sell and get rid of it and start over. 150K, always serviced, never had a issue till now. Software from DX3 is current, no updates avail to Firmware.