MANUFACTURER DOCUMENTATION
Ram 2500
6.7L diagnostic update; revised code scope.
Documented years: 2016
Match the document’s model, years, engine, market and other conditions. This page does not establish every code the vehicle can display.
Diagnostic guides
No full diagnostic guide has been published for this model yet.
Manufacturer bulletins
Cummins update with corrected revision scope
The later revision removes P0401 from the listed update conditions.
Scope: 2016; North America · 6.7L I6 Cummins Turbo Diesel ETK; DJ/D2
Displays in the document: P0128, P0300, P0301-00, P0302-00, P0303-00, P0304-00, P0305-00, P0306-00
Use revision A and diagnose unlisted faults separately.
The superseded July 9 version is not evidence for a P0401 software repair. RSU eligibility requires a VIN check.
Sources and scope
- 18-130-22 revision A — codes removed (July 20, 2022)
FCA US LLC · Checked 2026-10-30