ARP Logistics Solutions, we specialize in mobile heavy-duty truck diagnostics and fleet support. Mobile On-Site Service, Experienced Diesel Diagnostics, DPF Diagnostics DEF System Diagnostics Forced Regens, Diagnostics Check Engine Diagnostics Electrical Troubleshooting No-Start Diagnostics Derate Issues We help transportation companies reduce downtime with fast, accurate, on-site diagnostics and responsive service solutions. Our mission is simple: Reduce downtime. Keep fleets moving.