Mobile Heavy-Duty Diesel Diagnostics for Semi-Trucks

Semi-Truck Engine Diagnostics at Your Location

Modern heavy-duty diesels don't give up their secrets to a parts-store code reader. Our technicians run dealer-level diagnostic software for the major truck and engine makes, which means we can do at your yard or roadside what most trucks get towed to a dealership for: read fault codes with full context, view live sensor data, run forced tests and pinpoint the actual failed component — not just the symptom.

• Check-engine and stop-lamp diagnostics — codes read, explained in plain language, and repaired
• Engine derate and limp-mode faults — including DEF, SCR and DPF emissions issues, the most common cause of derates on newer trucks
• No-start and hard-start diagnosis — fuel, air, electrical and compression causes isolated on-site
• Electrical diagnostics — batteries, starters, alternators, wiring and sensor faults traced properly
• Driveability problems — low power, rough running, excessive smoke, overheating

Diagnosed and Fixed in the Same Visit

Diagnostics are only half the job. Our service vans carry the tools and common parts to complete most repairs immediately after diagnosis — air and brake work, cooling system repairs, electrical fixes and more. When a repair needs a part we don't stock, we source OEM or aftermarket parts fast and finish the job at your truck.

Local Techs, Corridor-Wide Coverage

We're based in the Bellingham–Ferndale area, the primary focus of our diagnostic coverage, and we cover the I-5 corridor from Blaine to Portland. For fleets, diagnostic checks can be rolled into preventive maintenance visits so small faults get caught before they derate a truck on a delivery run.