07/30/2026
When this 2024 Ram Cummins went into an engine derate warning, it couldn’t make it to a repair shop. Instead, The Diesel Man Mobile Repair & Fleet Services came to the truck at a truck stop in Colorado Springs and performed the diagnosis on-site.
Getting into the truck’s computer wasn’t as simple as plugging in a scan tool. Newer Ram trucks use a secure gateway, so having the proper software subscriptions and professional diagnostic equipment is critical. Fortunately, we have the tools and access needed to communicate with these newer trucks.
After diagnosing the issue, we found the culprit—a loose wire at the DEF doser injector. Once the wiring was repaired and secured, the emissions system began operating correctly, and the engine derate warning cleared on its own without replacing unnecessary parts.
Whether your truck is stuck at a truck stop, on the side of the road, at a job site, or in your yard, we bring professional diesel diagnostics and repairs directly to you.
The Diesel Man Mobile Repair & Fleet Services proudly provides mobile diesel repair in Colorado Springs, Pueblo, Fountain, Falcon, Monument, Cañon City, Rocky Ford, La Junta, Lamar, and throughout Southern Colorado.
Need a mobile diesel mechanic? Call 719-225-2821 or visit dieselmanmobile.com.