You can search and find a lot of threads on the subject but when they are talking about code-free the code(s) various permutations codes set when the ECM thinks the DPF is full. When the ECM thinks the DPF is full it tries to clear it with what is know as an active regen. During active regen the computer injects diesel on the exhauste stroke in order to send it to the DPF. Of course you no longer have a DPF so this means the diesel vaporizes and exits the tailpipe as a cloud of white smoke.
This is where I am at and I will be removing the EGR soon but that is not going to stop the active regens every couple on minutes once the engine is up to running temp.
This is where I am at and I will be removing the EGR soon but that is not going to stop the active regens every couple on minutes once the engine is up to running temp.