Diesel engines power the American freight industry, and when yours has a problem, you need someone who speaks diesel. Mobile Truck & Trailer Repair of Knoxville provides mobile diesel engine diagnostics and repair throughout Knoxville, TN. We come to you with OBD-II and manufacturer-specific diagnostic tools to read fault codes and pinpoint issues.

Our diesel mechanics work on Cummins, Detroit Diesel, Caterpillar, PACCAR, and International engines. From Freightliner Cascadias to Peterbilt 389s, Kenworth T680s to Volvo VNLs, we know these powertrains inside and out. Call (865) 424-7502 and tell us what your truck is doing. We will bring the right tools.

Common diesel engine issues we diagnose and repair on-site: hard starting or no-start conditions, excessive white or black smoke, loss of power under load, overheating, oil pressure warnings, coolant contamination, turbocharger failure, EGR valve problems, DPF regeneration issues, and fuel system faults.

We carry a mobile parts inventory including fuel filters, serpentine belts, coolant hoses, thermostats, glow plugs, injector seals, and common sensors. For larger repairs requiring parts we do not stock, we can diagnose the problem on-site, source the part, and return to complete the repair. No unnecessary tow bills.

Get a Free Quote: (865) 424-7502

Preventive engine maintenance is cheaper than emergency repairs. If you are in the Knoxville area and want to keep your diesel running right, ask about our maintenance services. Regular oil analysis, coolant testing, and belt inspections catch problems before they leave you on the shoulder. Reach us at (865) 424-7502.