DEF and DPF Emissions Repair
in New Bern, NC
A derated diesel is a frustrating and costly problem. When your DEF warning light comes on or your engine enters limp mode, you need it fixed now. American Service and Supply provides mobile DEF and DPF emissions repair across New Bern and eastern North Carolina. Chase comes to your location, diagnoses the system, and gets your diesel back to full power.
DEF System Cleaning and Repair
The Diesel Exhaust Fluid system is critical for meeting emissions standards. When DEF injectors clog, sensors malfunction, or fluid quality degrades, your engine triggers fault codes and reduces power. We clean DEF system components, replace failing parts, and restore proper operation.
We handle DEF heater failures, quality sensor issues, injector clogs, and supply line problems. Our diagnostic equipment reads the specific fault codes so we address the root cause, not just the symptom.
DPF Regeneration and Filter Service
The diesel particulate filter captures soot from exhaust. Over time, especially with lots of short trips or city driving, the filter becomes too clogged for passive regeneration. Your engine derates, loses power, and may refuse to accelerate.
We perform forced regeneration on-site using professional diagnostic tools. This burns off the accumulated soot and restores your DPF to working condition. For severely damaged filters, we can discuss replacement options and get you back on the road.
Computer Resets and Fault Code Clearing
After repairing the physical DEF or DPF issue, we clear all fault codes and reset the engine computer. This step is essential. If you do not clear the codes, the engine may stay in derated mode even after the underlying problem is fixed.
We verify the system is reading correctly before we leave. Your diesel should return to full power and normal operation after our service.
“I was in a pretty bad situation with my RAM Promaster that had some issues with the DEF system. Chase came out, cleaned everything, ran a regen, cleared the computer and I was able to get back on the road. Very reasonably priced, and followed later to be sure everything was still working as it should. Great job, great Service!”
Jason C.
How Our Emissions Repair Process Works
Diagnostic Scan
We connect to your vehicle's computer and read the specific DEF and DPF fault codes to identify the exact problem.
Clean or Repair DEF Components
We clean clogged injectors, address sensor issues, and ensure the DEF system is functioning properly.
Force Regen the DPF
Using professional equipment, we run a forced regeneration to burn off accumulated soot in the diesel particulate filter.
Clear Codes and Verify
We clear all fault codes, reset the computer, and verify the system reads clean before we leave.
Frequently Asked Questions
What is a DEF system and why does it need service?
DEF stands for Diesel Exhaust Fluid. It is part of the emissions system that reduces nitrogen oxide output. Over time, DEF injectors can clog, sensors can fail, and the system can trigger fault codes that derate your engine. Regular maintenance and timely repair keep your diesel running at full power.
What does forced regeneration do?
Forced regeneration burns off accumulated soot in the diesel particulate filter (DPF). When the DPF gets too clogged, the engine enters limp mode or derates. A forced regen restores the filter and brings your diesel back to normal operation.
Can you clear fault codes and computer resets on-site?
Yes. We bring professional diagnostic equipment to your location. After repairing the DEF or DPF issue, we clear fault codes, reset the computer, and verify the system is functioning properly before we leave.
How do I know if my diesel has a DEF or DPF problem?
Common signs include a check engine light, reduced power, inability to accelerate, a DEF warning on the dashboard, or the engine entering limp mode. If you see any of these symptoms, call us at (910) 358-4884 for diagnosis.
What vehicles do you service for DEF and DPF issues?
We service diesel trucks, vans, and commercial vehicles including Ram Promaster, Ford Transit, Chevy Express, and heavy-duty pickups. If it is a diesel with a DEF system, we can help.
DEF or DPF Problem? We Can Help.
Call us for mobile emissions repair or fill out the form below.