DPF, Regen & Derate Problems — Mobile Diesel Emissions Service

What the mechanic does on site

With dealer-level diagnostic tools, the mechanic reads the aftertreatment fault codes, runs a forced/parked regen where the system allows it, and diagnoses the underlying cause — DEF quality and dosing, sensors, or a DPF that genuinely needs cleaning.

Roadside or shop?

Most derate events clear on site with a forced regen plus fixing the fault that caused it. A fully plugged DPF needing bake-off cleaning is shop work — but you will know that from a diagnosis on the shoulder, not after a tow.

RIG works on anything diesel — and only diesel. Big rigs and semi trucks, diesel RVs and motorhomes, diesel pickups and work trucks: every mechanic in the network is a diesel mechanic, so your breakdown goes to someone who works on engines like yours every day.