When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Who can help me out or give me advice on this system. 2013 6.7, installed a new DEF fluid heater in October but can't remember the last time i saw light come on for cleaning exhaust (even although if you are not looking you shall miss it). How would one know if this system is working correctly. One could only imagine that the particulate filter would probably have shut me down by now. Thanks
If you have DEF issues you'd probably know it, they are relentless. Per Doug's message above - there are 3 separate emissions systems in your truck - EGR - Exhaust Gas Recirculation, DEF - Diesel Exhaust Fluid and DPF - Diesel Particulate Filter. They are pretty independent of each other - I say "pretty independent" because they all mess with the exhaust and in some ways may impact each other.