Mobile Diagnostics for Commercial Fleets

A man is working on the engine of a blue truck.

Fast, Accurate Fault Detection

On Your Lot or Roadside

When a check engine light comes on or a vehicle isn’t performing like it should, you need answers—fast. At Velocity Mobile Truck Repair, we bring advanced diagnostic tools and certified expertise directly to your fleet, wherever you are.


Whether it’s a single truck or an entire fleet, our on-site diagnostics eliminate guesswork, shorten repair time, and keep your operations running smoothly.


Serving Denver, the Colorado Front Range, mountain regions, and southern Wyoming, we’re your trusted mobile diagnostics team for diesel engines, electrical systems, and onboard computer faults.

Our Mobile Diagnostic Services

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Onboard Computer Systems

  • ECM/PCM/TCM code reading & clearing
  • Sensor and actuator testing
  • Live data analysis during operation
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Fleet-Wide Health Assessments

  • Pre-trip or preventive diagnostics
  • Scan-and-report for fleet compliance
  • Integrated repair recommendations

We use dealer-grade diagnostic tools and OEM-level software to identify and troubleshoot faults across all makes and models of commercial vehicles.

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Diesel Engine Diagnostics

  • Check engine light & fault code scans
  • Fuel injector performance analysis
  • Turbocharger, DPF & EGR system checks
  • Crank/no start troubleshooting
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Electrical System Diagnostics

  • Battery drain detection
  • Alternator and starter testing
  • Lighting, wiring, and fuse problems
  • ECU communication and sensor errors
A man is holding a tablet in front of a truck in a garage.

Why Mobile Diagnostics Matter

  • Avoid Costly Downtime
  • Identify issues before they become breakdowns.
  • Faster Repairs
  • We pinpoint the exact cause—so we can fix it faster, often on the same visit.
  • No Towing or Shop Delays
  • Diagnostics come to you, saving valuable time and transport costs.
  • Complete Transparency
  • We explain every issue clearly and provide a documented plan of action.

Diagnostics for All Major Brands

We support leading diesel and fleet platforms including:

  • Freightliner, Peterbilt, Kenworth, Volvo, International
  • Ford, Chevy, Dodge (commercial series)
  • Isuzu, Hino, Mack, Western Star, and more
  • Reefer units and trailer systems

Velocity supports diagnostics for:

  • Delivery fleets & logistics providers
  • Construction & utility vehicles
  • Municipal & government fleets
  • Owner-operators & regional carriers

Our Service Area

We provide mobile diagnostics throughout:

  • Metro Denver
  • Colorado Front Range – Boulder, Fort Collins, Colorado Springs, Greeley, Pueblo
  • Mountain Colorado – Vail, Glenwood Springs, Steamboat, Summit County
  • Southern Wyoming – Cheyenne, Laramie & surrounding areas

Request Diagnostics Today

  • Call (303) 949-3699
  • Same-day and emergency dispatch available
  • Mobile service across Colorado and Wyoming


Get the answers your fleet needs—fast, accurate, and on-site