⚠️ Warning Signs Your Engine Diagnostics & Repair Needs Immediate Attention
- Check engine light illuminated
- Loss of power or acceleration
- Excessive smoke from exhaust
- Unusual engine knocking or noises
- High oil consumption
- Overheating engine
- Fuel efficiency drops significantly
- Engine misfires or rough idling
How This Issue Affects Your Truck & Business
An untreated engine problem in your semi truck or commercial vehicle can lead to catastrophic engine failure, requiring a complete engine replacement that can cost $30,000–$80,000+. A simple diagnostics check and early repair can save you tens of thousands of dollars and prevent dangerous breakdowns on I-95, I-66, or any Northern Virginia highway.
Professional Engine Diagnostics & Repair in Northern Virginia
At Legget Truck Repair, we understand that your commercial truck's engine is the heart of your operation. When something goes wrong — whether it's a check engine light, loss of power, or strange noises — you need fast, accurate diagnosis and reliable repairs. Our certified diesel mechanics specialize in engine diagnostics and repair for all heavy-duty commercial vehicles including semi trucks, 18-wheelers, Freightliners, Peterbilts, Kenworths, Macks, Volvos, International trucks, Western Star trucks, and more.
What We Check During Engine Diagnostics
Our technicians use professional-grade OBD (On-Board Diagnostics) scanners and diagnostic tools specific to commercial truck platforms including Detroit Diesel (DDDL), Cummins (Insite), Caterpillar (ET), Paccar (ESA), and Volvo PTT. We provide a complete engine health assessment covering:
- Electronic Control Module (ECM/ECU) fault code reading and analysis
- Fuel system pressure and injector performance testing
- Turbocharger and intercooler inspection
- EGR (Exhaust Gas Recirculation) system diagnosis
- DPF (Diesel Particulate Filter) status and regeneration issues
- Coolant system and thermostat testing
- Oil pressure and lubricant analysis
- Cylinder compression testing
- Belt, hose, and accessory drive inspection
Common Engine Problems We Fix
Our experienced technicians have diagnosed and repaired thousands of engine issues on semi trucks, box trucks, and commercial vehicles throughout Northern Virginia, including:
- Blown head gaskets
- Failed injectors and injection pump issues
- Turbocharger failures and boost leaks
- EGR valve and cooler failures
- DPF regeneration failures
- Overheating and cooling system failures
- Oil leaks and excessive oil consumption
- Engine misfires and rough running
- No-start and hard-start conditions
- Limp mode and derate conditions
Mobile Engine Repair — We Come To You on I-95, I-66 & All Northern Virginia Roads
Truck broke down on the highway? Our mobile truck repair service means we come directly to your location — whether you're on I-95 near Fredericksburg, I-66 near Fairfax, I-395 in Arlington, I-495 near Springfield, or anywhere in Northern Virginia within 30 miles of Woodbridge. We carry the tools and parts needed to perform many engine repairs on-site, getting you back on the road faster and avoiding costly towing fees.
We service all engine types including Detroit Diesel Series 60, DD13, DD15, DD16, Cummins ISX, ISB, ISC, X15, Caterpillar C13, C15, Paccar MX-11, MX-13, Volvo D11, D13, D16, Mack MP7, MP8, and more.
Truck Brands We Service for Engine Repair
Our engine repair services cover all major commercial truck manufacturers:
- Freightliner Cascadia, Columbia, Classic, FLD
- Peterbilt 389, 579, 567, 587
- Kenworth T680, T880, W900, T660
- Volvo VNL, VNR, VNX
- Mack Anthem, Pinnacle, Granite, TerraPro
- International LT, RH, HX, LoneStar
- Western Star 4900, 5700
- Box trucks (Isuzu, NPR, NQR, Ford F650/F750)
- Diesel buses and commercial vehicles
Serving Arlington, Alexandria, Fredericksburg, Fairfax & All of Northern Virginia
Legget Truck Repair provides engine diagnostics and repair services across the entire Northern Virginia region including Arlington VA, Alexandria VA, Fredericksburg VA, Fairfax VA, Reston VA, Manassas VA, Lorton VA, Springfield VA, Dale City VA, Lake Ridge VA, Burke VA, Leesburg VA, Hybla Valley VA, Newington VA, North Springfield VA, West Springfield VA, and all surrounding areas within 30 miles of our Woodbridge, VA location.
We also respond to breakdown calls on all major interstates and highways including I-95 (the busiest commercial corridor in Northern Virginia), I-66, I-395, I-495 (Capital Beltway), US Route 1, US-29, Virginia Route 7, and Virginia Route 28.
Why Choose Legget Truck Repair for Engine Work?
We are a family-owned truck repair business based in Woodbridge, VA, serving commercial truck operators since 2022. Our technicians are trained and experienced in heavy-duty diesel engine systems and stay current with the latest manufacturer diagnostic updates and repair procedures.
- Certified diesel mechanics with manufacturer-specific training
- Professional-grade diagnostic tools for all major engine platforms
- 24/7 mobile service — we come to your location
- Fair, transparent pricing with upfront estimates
- Fast response time — average under 60 minutes in Northern Virginia
- Accept all major payment methods including fleet cards
🚛 Need Engine Diagnostics & Repair? Call Us Now!
We provide 24/7 mobile engine diagnostics & repair for semi trucks, trailers, RVs, buses, and all commercial vehicles throughout Northern Virginia. We come directly to your location — on the highway, at your yard, or anywhere you need us.
(501) 284-6566Vehicles We Service for Engine Diagnostics & Repair
We specialize in heavy-duty commercial vehicles ONLY. We do NOT service pickup trucks or passenger vehicles.
Service Areas for Engine Diagnostics & Repair
We provide engine diagnostics & repair throughout Northern Virginia: