FOXWELL HD301 Heavy-Duty Truck Scanner — 6/9/16‑Pin Diesel Code Reader with Live Data & Free Updates

The FOXWELL HD301 is a plug-and-play heavy-duty truck scanner that reads and clears diesel fault codes and accesses full-system vehicle modules across 6-, 9- and 16-pin platforms.

The HD301 combines a straightforward code reader with advanced heavy-duty diagnostic coverage so fleets, owner-operators and technicians can quickly identify issues on commercial diesels and many other diesel-powered machines. It supports legacy and modern truck protocols and displays live sensor data with an onboard DTC lookup library—no internet required. Designed for rugged use, it requires no app, batteries, or subscription fees and receives free lifetime updates to stay current with vehicle changes.

How does the HD301 connect to older and newer trucks?

The scanner includes a built-in 16-pin OBDII connector plus two adapters for professional 6-pin and 9-pin truck connectors, letting you interface with a wide range of commercial vehicles. It interprets J1939, J1708 and J1587 protocols alongside standard OBDII where applicable, so you can plug in and start diagnostics regardless of model year.

• Integrated 16-pin OBDII port with included 6-pin and 9-pin adapters
• Protocol compatibility: J1939, J1708, J1587, and OBDII
• Works with major diesel brands: Cummins, PACCAR, Detroit, Caterpillar, and more
• Menu option (WWW-OBD) recommended for certain diesel pickups

What diagnostic functions can I run with this tool?

The HD301 scans every accessible electronic control module—engine, transmission, ABS, SRS, chassis and body control—so you get a full-health snapshot of the vehicle. It reads and erases diagnostic trouble codes, shows live sensor values in readable text, and includes an on-device DTC definition library for quick code interpretation.

• Full-system ECU scanning across truck modules
• Read and clear fault codes; turn off MIL/check-engine lights
• Live data: coolant temp, fuel pressure, RPM and other key sensors
• Built-in DTC lookup for immediate code definitions

Can the HD301 replace dealer-level tools or support maintenance workflows?

The HD301 provides professional-grade information that helps you diagnose problems and prioritize repairs, reducing time spent at shops and costly diagnostic fees. While it delivers deep module access and useful live data, some manufacturer-specific programming and advanced calibrations remain exclusive to OEM dealer tools—this unit focuses on fault finding and routine resets rather than programmed reflash functions.

• Identifies faults quickly to speed repair decisions
• Enables many routine resets and code clears without dealer visits
• Not intended for ECU programming, reflashing, or DPF regeneration
• Lifetime free updates, no subscription, no WiFi required

Which vehicles and environments is the scanner suitable for?

Although optimized for commercial trucks and diesels, the HD301 also supports pickups, buses, trailers, off-road machines, agricultural and marine diesel applications. Its robust adapter set and wide protocol coverage make it a single diagnostic tool across mixed fleets, construction sites and service bays.

• Commercial trucks: Freightliner, Kenworth, Peterbilt, International, Mack, and more
• Diesel engines: Cummins, PACCAR, Detroit, Caterpillar compatibility
• Useful for pickups, buses, tractors, excavators, marine engines
• Rugged plug-and-play design for field and shop use

Who is this for: The FOXWELL HD301 is aimed at fleet managers, diesel technicians and owner-operators who need reliable, broad diagnostics without subscription costs. It is also a good fit for service shops handling mixed fleets and for owners of heavy equipment who want to diagnose faults and access live data themselves. If you require manufacturer-level programming or DPF regen functions, supplement this scanner with OEM tools; for fast fault discovery, code clears and live-sensor insight, the HD301 is a practical, low-friction solution.