Diesel Engine Diagnostics
Diesel engine diagnostics for commercial trucks in Colorado, Wyoming, and Texas — fault codes, no-starts, charging, fuel, and cooling concerns traced by mobile and shop technicians, with repair options you can plan around.
Check-engine and fault-code diagnostics
No-start diagnosis — starter, batteries, fuel, or electronics
Charging system testing — alternators, batteries, cables
Fuel system diagnosis — pumps, filters, and injectors
Cooling and overheating diagnosis
Engine sensor diagnostics
When this service is the right call
Check-engine light or derate with codes that need decoding
A unit cranks but won't start, or starts and dies
Rough running, misfires, or power loss on grades
Battery or alternator problems leaving units dead
Coolant loss or running-hot patterns
Intermittent faults no one has pinned down
- Unit make, model, and engine family
- Fault code numbers, if visible
- Symptom history — when it started and what changed
- Whether the unit runs at all or is down where it sits
- Location and preferred timing
- 01Call dispatch; coverage for the location is confirmed
- 02A diesel tech reads codes and runs tests at the unit
- 03The root cause is traced — electronics, fuel, air, or cooling
- 04Repair options are reported so you can plan around downtime
- 05Work focuses on diagnosis, repair, and system service — engine rebuilds are not offered
Mobile service
Roadside and yard diagnostics across Colorado, Wyoming, and Texas — most fault tracing happens at the unit.
Shop repair
Diagnosis needing specialized equipment or deeper teardown routes to the fixed shops in Harlingen and McKinney, TX; Brush, CO; and Green River, WY. Engine rebuilds are not offered.
Coverage for your exact location is confirmed by dispatch when you call (303) 476-3622. Region detail is in the service area directory.