Mobile Diesel Engine Diagnostics & DPF Service in Big Spring, TX

Modern diesel engines rely on intricate electronic control modules (ECMs), exhaust aftertreatment sensors, and common-rail fuel management systems. When an active fault triggers engine derate on Interstate 20 or an oil lease, guessing costs thousands of dollars. RoadRunner Road Services carries all dealership software and advanced diagnostic computers covering Cummins Insite, Detroit Diesel Diagnostic Link (DDDL), CAT ET, Volvo/Mack Tech Tool, and PACCAR Davie.

We connect directly to your 9-pin or OBD diagnostic port on-scene, read active and inactive trouble codes, perform cylinder cut-out tests, evaluate live sensor telemetry, and pinpoint root failures within minutes.

Diesel Particulate Filters (DPF) inevitably fill with soot during extended idling or interrupted passive regeneration cycles. When your dash lights up with high soot loading or DEF system faults, the ECM initiates engine derate. We perform stationary forced DPF regenerations, clear ghost fault codes, reset soot counters, and evaluate differential pressure sensor voltages so your rig operates at 100% horsepower.