Need Help?

Contact our service department for the maintenance and repairs you need to stay on the road. Be sure to ask about training for your technicians and drivers.

Contact Service


Service Tip for January 2023
Diesel Particulate Filter Regeneration

Parked and passive regens are a critical part of your engine’s health. While some trucks may have a “regen inhibit” switch installed, it is critical to not overuse this feature. Not allowing your truck to perform a regen may lead to catastrophic aftertreatment system damage.

  • Limit city driving as much as possible. Low speed and stop-and-go drive cycles do not allow the vehicle's exhaust to get hot enough to passively regenerate and will require more frequent parked regens.
  • Drive the truck at freeway speeds for at least 20 minutes a week. This will allow the truck to passively regenerate and clean off some of the built up soot in the DPF.
  • If a driver is not familiar with how the regen system works, under the drivers side visor, there is information explaining the lights on the dash and warnings about running parked regens.

If you are concerned about the health of your system, Peterson can perform an inspection to make sure temperatures and soot loads are where they need to be to keep you on the road.