Heavy Duty Truck Diagnostic Scanners & Scan Tools

(3 products)

Heavy duty truck diagnostic scanners for Class 4–8 commercial trucks, buses & diesel engines. iCarsoft HD scan tools read J1939 / J1708 protocols, perform forced DPF regeneration, after-treatment service and full-system diagnostics across Cummins, Detroit Diesel, CAT, Volvo, Mack, International and more.

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Not every truck engine or model year is covered by every scanner. To make sure you pick the right heavy duty scan tool, please send us your VIN (or engine make/model + year) before ordering — we'll confirm compatibility, supported functions and recommend the best fit within 24 hours. Email service@icarsoft-us.com or use the live chat at the bottom-right of this page.

📖 Heavy Duty Scanner Buyer's Guide Supported brands · Protocols · Functions · How to choose · FAQ

Professional Heavy Duty Truck Diagnostic Scanners

Whether you're keeping a single semi-truck on the road or running a fleet repair shop, iCarsoft heavy duty scan tools deliver the same code reading, bi-directional control, DPF regeneration and after-treatment diagnostics as the dealer-level equipment — at a fraction of the cost, with no subscription fees.

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Class 4–8 Coverage

Semi-trucks, dump trucks, buses, RVs, agricultural and construction equipment.

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DPF Forced Regen

Manually trigger DPF regeneration, monitor SCR/DEF status, reset after-treatment counters.

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J1939 & J1708 Protocols

Full SAE J1939 and J1708/J1587 protocol support for modern and legacy diesel ECUs.

Supported Heavy Duty Truck Brands

North American TrucksFreightliner, Kenworth, Peterbilt, International (Navistar), Mack, Western Star, Ford F-Series HD

European & Asian TrucksVolvo Trucks, Scania, MAN, DAF, Iveco, Mercedes-Benz Actros, Hino, Isuzu, UD Trucks

Diesel Engine BrandsCummins, Detroit Diesel, Caterpillar (CAT), PACCAR MX, Volvo D-series, International MaxxForce

Buses, RVs & Off-HighwaySchool buses, transit coaches, motorhomes, construction & agricultural diesel equipment

Diagnostic Functions Covered

All-System Code Reader — Heavy duty truck scanner that reads/clears DTCs across engine, transmission, brakes, after-treatment, body control and more
Forced DPF Regeneration — Manually initiate diesel particulate filter regen cycles when the truck won't auto-regen
After-Treatment Diagnostics — SCR (Selective Catalytic Reduction), DEF (Diesel Exhaust Fluid) dosing, NOx sensor monitoring
Bi-Directional Active Tests — Cylinder cutout, injector trim, output tests, glow plug control (model-dependent)
Service Resets — Oil/service reset, brake adjustment, parameter setting (PID), maintenance counter reset
Live Data Streaming — Real-time PIDs (RPM, boost, coolant temp, EGT, fuel rail pressure, DEF tank level) with graphing

How to Choose Your Heavy Duty Scanner

ENTRY

iCarsoft HD V3.0 — $109.95Best entry-level heavy duty code reader for owner-operators — reads/clears engine, transmission & ABS codes via SAE J1939 / J1708, live data, freeze frame.

PRO

iCarsoft HD V4.0 — $462.95Multi-system heavy duty diagnostic tool with DPF regen, after-treatment service, bi-directional tests and broader ECU coverage. Best for independent repair shops.

ENTERPRISE

iCarsoft CR Unicorn S — $3,499.99OE-level professional scanner for both passenger cars and Class 4–8 heavy duty trucks — 41+ service functions, full bi-directional control, built for fleet shops and dealer-grade diagnostics.

Why iCarsoft for Heavy Duty Diagnostics

Cummins INSITE, Detroit Diesel DDDL and CAT ET each cost thousands of dollars per year in licensing — and only cover one engine brand. iCarsoft heavy duty truck scan tools give you cross-brand diagnostics in a single device, with free lifetime software updates, no per-engine licensing, and 12-month manufacturer warranty.

Frequently Asked Questions

How do I know which iCarsoft heavy duty scanner fits my truck?

Different iCarsoft HD models cover different protocols, engine ECUs, and after-treatment systems. The most reliable way is to send us your truck VIN (or engine make/model + year) before ordering — we'll confirm compatibility and recommend the right model within 24 hours. Email service@icarsoft-us.com.

Can iCarsoft force a DPF regeneration on my truck?

Yes — the HD V4.0 and CR Unicorn S support manual / forced DPF regeneration on most modern diesel trucks, plus SCR/DEF after-treatment diagnostics. The HD V3.0 reads/clears DPF-related codes but does not initiate forced regen. Send us your engine info to confirm.

Does it support both J1939 and J1708 protocols?

Yes. All iCarsoft heavy duty scan tools support SAE J1939 (modern CAN-based heavy duty protocol) and J1708 / J1587 (older serial protocol used on pre-2007 diesel engines), covering trucks from the late 1990s to current model years.

Will the same scanner work on my passenger car too?

HD V3.0 and HD V4.0 are heavy duty specialists and won't read passenger car ECUs. If you need one tool for both light vehicles and HD trucks, the iCarsoft CR Unicorn S is purpose-built for shops that service mixed fleets — full coverage on both Class 1–3 passenger vehicles and Class 4–8 heavy duty.

Is there a subscription or annual fee?

No. Every iCarsoft heavy duty scanner includes free lifetime software updates with no subscription, no per-engine licensing, and no extra software charges — unlike Cummins INSITE, Detroit Diesel DDDL or CAT ET.

🔄 Free Lifetime Updates

🛡 12-Month Warranty

📦 Free US Shipping

💬 Expert Tech Support