Diesel Laptops CAN3-to-CAN1 Crossover Adapter Cable — Compatible with Nexiq, DPA5, Cummins; Durable 24‑Month Warranty

Modern heavy trucks sometimes carry engine data on an alternate controller area network (CAN) bus labeled CAN3 rather than the more common CAN1. If your diagnostic interface is built to listen on CAN1, it will not show engine parameters or fault codes unless you use a cross over adapter that maps CAN3 engine traffic into CAN1. This Diesel Laptops converter provides that bridge and works with a wide range of industry diagnostic hardware.

Which vehicles require this CAN3-to-CAN1 adapter?

Some manufacturers moved engine data onto CAN3 beginning around the 2016 model year. Notable trucks and engines that commonly use CAN3 for engine communication include later Peterbilt and Kenworth models and certain Cummins-equipped units.

• 2016 and newer Peterbilt models
• 2016 and newer Kenworth models
• Cummins engines on select platforms

Will this adapter work with my diagnostic tool?

This crossover cable is designed to be compatible with virtually all known truck diagnostic interfaces. It simply remaps the CAN3 engine traffic onto the CAN1 wiring so tools that read CAN1 can access the engine data without firmware changes.

• Compatible with Nexiq USB Link (original and USB Link 2)
• Works with DG Tech DPA5 and DPA5 Plus
• Supports Noregon DLA 2.0+, DrewTech DrewLinQ and TVIT
• Also compatible with Cummins Inline 5/6/7 and CAT Comm III

How durable and reliable is the adapter in a shop or field environment?

The cable is built for everyday professional use with a compact, robust housing and reliable electrical connections. It is intended to hold up to repeated tool connections, mobile use, and the typical stresses of fleet maintenance.

• Compact, durable construction for shop or roadside use
• Designed for repeat connects and long-term service
• Backed by a 24-month warranty for peace of mind

What do I get when I buy this adapter?

Beyond the physical crossover cable, the purchase includes a short-term digital benefit to help with repairs and diagnostics. The adapter is plug-and-play—no programming required—so you can get tools reading engine parameters quickly.

• One CAN3-to-CAN1 crossover adapter cable
• Free 30-day subscription to Diesel Repair resources
• 24-month product warranty and technical compatibility notes

Who is this for: Technicians, fleet maintenance managers, and independent repair shops that service 2016-and-newer Peterbilt and Kenworth trucks or Cummins-equipped vehicles and who use diagnostic interfaces expecting engine data on CAN1. If your scan tools show missing engine parameters or cannot retrieve engine fault codes on affected trucks, this adapter lets your existing hardware communicate properly without expensive interface upgrades.

Features:

• Compact, durable design
• Universal fit with all truck diagnostic tools
• 24-month warranty