Thanks Ed. At least on the big trucks ( most) you can force a regen. On MH's that is not possible. But plugged DPF's on class 8 are still a problem. Some can be cleaned but others need to be replaced. When they are selling used
tractors at a dealer they often advertise that the DPF has been changed. We RV'rs are lucky. We have very few emission system problems. How many MH's have over 300,000 miles? In an OTR truck that is 2 years! The big carriers buy say 1000 trucks when they only need 750. That way have a truck ready to go. It can take up to a month to get parts for a new truck emission system.. They often have to engineer a new sensor to solve the problem. Down time is a serious problem. Since DEF began the systems are much better.
Moisheh