Mobile Diesel USA
Engine Diagnostics & Repair.
Advanced computer diagnostics and hands-on engine repair for all diesel makes — dispatched to your location. No shop visit required.
Why Mobile Diesel USA?
Find the problem. Fix it where you stand.
Modern diesel engines throw codes, derate, and shut down for dozens of reasons. Our mechanics carry OEM-level scan tools and years of experience to pinpoint the issue fast. From a simple sensor swap to a major engine repair, we handle it on-site.
- OEM-level diagnostic scan tools
- All major diesel makes covered
- On-site repair — no tow to a shop
- Transparent quoting before work begins
What We Cover
Engine Diagnostics & Repair services.
Our mobile mechanics carry the tools, parts, and expertise to handle these repairs at your location.
Fault Code Diagnosis
Full ECM scan, fault code interpretation, freeze frame data analysis, and root cause identification for check engine lights and derate conditions.
Turbocharger Repair
Turbo boost leak testing, wastegate adjustment, VGT actuator repair, and turbo replacement for all major diesel platforms.
Injector Service
Injector testing, replacement, and calibration. Contribution balance testing and cylinder cutout diagnosis for rough-running engines.
Head Gasket & Top End
Coolant-in-oil diagnosis, head gasket replacement, valve adjustment, and cylinder head repair performed on-site when possible.
EGR & Emissions Systems
EGR valve cleaning and replacement, EGR cooler service, and emissions system diagnostics for derate and limp mode conditions.
Oil & Fluid Analysis
Oil pressure diagnosis, oil leak repair, coolant system pressure testing, and fluid analysis to catch problems before they become failures.
The Process
How it works.
Describe the Symptoms
Tell us what your engine is doing — codes, warning lights, performance issues, noises, or smoke. Include your truck make/model/year.
Mechanic Dispatched
We send a diesel engine specialist to your location with the right tools and common parts for your platform.
Diagnose & Quote
Your mechanic runs a full diagnostic, identifies the root cause, and provides a repair quote before starting work.
Repair Complete
Repair is performed on-site, codes cleared, and systems verified. You're back to full power with documentation of what was done.
FAQ
Common questions
Our mechanics service all major diesel engine platforms including Cummins, Detroit Diesel, CAT, PACCAR (MX-11, MX-13), Navistar/International, and Volvo/Mack. We cover Class 6 through Class 8 commercial vehicles.
Yes. Derate conditions are one of our most common calls. Our mechanics carry advanced scan tools that read OEM-level fault codes, perform forced regens, and access proprietary parameters needed to diagnose and clear derate conditions.
Our mechanics stock commonly needed parts like sensors, belts, hoses, filters, and gaskets. For major components like injectors or turbos, we can often source parts same-day from local suppliers and return to complete the job.
If a repair requires shop equipment (like a machine shop for cylinder head work), your mechanic will diagnose the issue, explain what's needed, and help coordinate next steps. Many repairs that seem shop-level can actually be completed in the field.
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?
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Tell us what's wrong and where you are. We'll match you with a nearby diesel mechanic who specializes in this service.
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