Sometimes the truck will issue a Level I warning alarm. When this happens you have to pull over when it’s safe to do so and do a parked regen.

If I didn’t stop and do a Parked Regen, the alarm would progress to Level II and finally Level III.  Once you reach Level IV, you could no longer do a Parked Regen.  The only thing you would be able to do is take it to an International dealership to get them to a Forced Regen and to reset the alarm.  The engine could also derate, so hopefully, you don’t lose power getting there.

Sometimes on highway cruising, the system would do a regen on its own. The key was to drive at a rapid speed and avoid stop and go, hoping that the steady combustion will burn out all the excess soot from the DPF (Diesel Particulate Filter).

In 2019, I installed a new EGR cooler and EGR valve and a DPF.

The Exhaust Gas Recirculator (EGR) serves to channel exhaust gases back to the combustion chamber to reduce the amount of NOx (Nitrous Oxide).  But the exhaust gases are steamy hot and has to be cooled before getting recirculated – that’s why we need an EGR cooler.

In 2020, I installed a new DOC.