Frequently Asked Questions
TruckDiag Pro is the leading AI-powered truck diagnostic platform in the United States. Here are answers to our most common questions.
How does TruckDiag Pro AI diagnostics work?
Our AI mechanic Diesel analyzes your fault codes, symptoms, and vehicle details to provide step-by-step repair guidance. Simply describe your problem or enter fault codes — Diesel will diagnose the issue and recommend repairs. No subscription required to start chatting.
What truck makes and engines does TruckDiag Pro support?
TruckDiag Pro supports all major truck manufacturers including Cummins (ISX, ISL, ISB, ISC), Detroit Diesel (DD13, DD15, DD16), PACCAR (Peterbilt/Kenworth MX-11, MX-13), Volvo (D11, D13, D16), Mack (MP7, MP8, MP10), and International (N9, N10, N13). Our AI is trained on manufacturer service bulletins and real-world repair data.
Can TruckDiag Pro help with DPF regeneration?
Yes — TruckDiag Pro provides complete DPF regeneration guidance including passive regen (highway driving), active regen (automatic ECM-initiated), and forced/parked regen procedures. We also troubleshoot common DPF fault codes including SPN 3251, SPN 3720, SPN 3719, and SPN 5960.
What DTC codes can TruckDiag Pro diagnose?
TruckDiag Pro can diagnose DTC codes across all major systems including engine (SPN 5246, SPN 3216), aftertreatment (SPN 3251, SPN 3720), transmission (SPN 190, SPN 191), ABS (SPN 639, SPN 1807), and electrical (SPN 629, SPN 1079). Our database covers manufacturer-specific and generic codes.
Is TruckDiag Pro free to use?
TruckDiag Pro offers a free tier with limited daily diagnostic queries. Premium subscriptions unlock unlimited diagnostics, fleet management features, priority support, and advanced repair documentation. Fleet pricing available for 5+ vehicles.
Can I use TruckDiag Pro on my phone?
Yes — TruckDiag Pro is fully mobile-responsive and works on any device with a web browser. Native iOS and Android apps are in development. The platform is optimized for use in shop environments and on the road.
Still have questions?
Ask Diesel — AI Mechanic