Mobile Diesel USA
Aftertreatment / DPF / DEF.
DPF regeneration, DEF system repair, and emissions compliance service — dispatched to your location. Clear derates and get back to full power.
Why Mobile Diesel USA?
Derate codes are costing you hundreds per day.
Aftertreatment problems are the #1 complaint from modern diesel truck operators. DPF clogging, DEF system faults, SCR efficiency codes, and forced derates cost real money every hour your truck is limited to 5 MPH. Our specialists clear codes and fix root causes on-site.
- Forced DPF regeneration on-site
- DEF system diagnostics and repair
- SCR catalyst and NOx sensor service
- Emissions derate code clearing
What We Cover
Aftertreatment / DPF / DEF services.
Our mobile mechanics carry the tools, parts, and expertise to handle these repairs at your location.
DPF Regeneration
Forced regen using OEM-level software, DPF soot load monitoring, and regen inhibit diagnosis for trucks that won't regen on their own.
DPF Cleaning & Service
DPF removal for professional cleaning, ash load assessment, and DPF replacement when cleaning is no longer effective.
DEF System Repair
DEF injector replacement, DEF pump service, DEF tank heater repair, and DEF quality sensor diagnostics.
SCR & Catalyst Service
SCR catalyst efficiency testing, NOx sensor replacement, and selective catalytic reduction system diagnostics.
EGR System Service
EGR valve cleaning and replacement, EGR cooler inspection, and EGR-related fault code diagnosis and repair.
Emissions Code Diagnosis
Complete emissions fault code analysis, derate level assessment, and root cause identification for all aftertreatment-related warning lights.
The Process
How it works.
Report the Code
Tell us your fault codes, derate status, and what happened leading up to the issue. Photos of the dash help.
Specialist Dispatched
We send an aftertreatment specialist with OEM-level software and the tools to diagnose and repair emissions systems.
Diagnose Root Cause
Your mechanic reads codes, checks soot levels, tests sensors, and identifies whether you need a regen, a repair, or a part replacement.
Full Power Restored
Repair is completed, codes cleared, and a test regen is run to verify the system is operating correctly.
FAQ
Common questions
Derate conditions are treated as high-priority dispatches since they directly impact your earning ability. A mechanic is usually rolling within the hour in active metros, and you get a real ETA on your tracking page once one is assigned. We'll get a specialist rolling to you quickly.
Yes. Our mechanics carry OEM-level diagnostic software that can initiate forced DPF regeneration at your location. We monitor the regen process to ensure it completes successfully and clear any related fault codes.
DPF cleaning removes accumulated ash (non-burnable residue) from the filter substrate. This is effective when the filter is structurally sound but ash-loaded. Replacement is needed when the filter is cracked, melted, or has been cleaned too many times to be effective.
Common causes include DEF quality issues (crystallized or contaminated fluid), failed DEF injectors, clogged DEF filters, faulty NOx sensors giving false readings, or wiring/connector problems. Our specialists diagnose the root cause rather than just replacing parts.
Testimonials
What Our Network Says
“Blew a turbo hose on I-20 outside Dallas at 11 PM. Had a mechanic on-site in 25 minutes. Back rolling in under two hours. This service is a game-changer for owner-operators.”
Marcus Johnson
Dallas, TX
“Had a DPF regen issue on I-40 near Memphis. The mechanic diagnosed it on-site and had me back on the road without a tow. Saved me at least $800 in towing fees alone.”
Derek Washington
Memphis, TN
“My Cascadia threw a check engine light on I-10 in 115-degree heat. Within 30 minutes a mechanic was running diagnostics. Professional, fast, and fair on price.”
James Cooper
Phoenix, AZ
Need This Service?
Get a mechanic dispatched.
Tell us what's wrong and where you are. We'll match you with a nearby diesel mechanic who specializes in this service.
Request ServiceDiesel Mechanic?
Join our network.
If you specialize in mobile diesel repair, we want you in our network. Apply today and start getting dispatched to jobs.
Apply Now