David Nelson
Emissions Technology Writer
David Nelson examines Volvo's aftertreatment systems - including DPF, DEF, and SCR - breaking down how they interact, how derates are triggered, and why troubleshooting in this area so often goes wrong. He explains the logic behind warning lights and the reasoning behind each targeted repair.
Jason Reed
Truck Maintenance & Ownership Writer
Jason Reed dives into Volvo truck systems to help owner-operators understand the financial impact of running their trucks and protect their bottom line. He tackles the toughest questions any owner can ask: What will it cost? What do I need to do? What should I look out for?
Michael Carter
Truck Technology Writer
Michael Carter specializes in the components of Volvo trucks, such as engine control systems, ECU (Engine Control Units) programming, and onboard communication systems; he explains what programs and systems mean to the behavior of the engine, and what software peripheral updates can mean as far as routine maintenance and trouble shooting are concerned. Carter’s writings have helped truck owners and do-it-yourself repair shops understand concepts that were once reserved for the manufacturer’s service centers.
Ryan Foster
Diesel Diagnostics Writer
Ryan Foster focuses on the complex mechanical side of misdiagnosed issues with Volvo D11 and D13 engines, such as recurring fault codes and performance problems that are hard to pin down. He walks through the actual logic of the diagnostic process, showing not just what to test next, but how to trace each symptom back to its root cause.