They manually asked for the DPF to start a regen to see if it was getting clogged for some reason. Still not helping and the light turned back on again with the same issues. He mentioned he did not think it would go out as it was a present fault. Last year I did have the intake cleaned out as a precaution. Any ideas what this could be that is causing it? Sent from my iPhone using So I had a CEL appear and ran down to my local Indy to get the code read and it came up with two issues.