SAE J 1939-90:2026-03-13

This Information Report is intended to supplement the J1939 documents by offering the application of SAE RP J1939 to OBD data communications in a form that can be sorted and searched for easier use. It is NOT intended as a substitute for the actual regulations and standards documents, and any discrepancies between this document and the published documents must be resolved in favor of the published documents. Regulatory Version(s): CARB 1971.1 OCTOBER 3, 2019 ; CARB 1968.2 OCTOBER 3, 2019; “CALIFORNIA GREENHOUSE GAS EXHAUST EMISSION STANDARDS AND TEST PROCEDURES FOR 2014 AND SUBSEQUENT MODEL HEAVY-DUTY VEHICLES” As Amended: September 9, 2021; “CALIFORNIA STANDARDS AND TEST PROCEDURES FOR NEW 2021 AND SUBSEQUENT MODEL HEAVY-DUTY ZERO-EMISSION POWERTRAINS.” As Adopted: June 27, 2019; EPA 40 CFR Part 1036 Subpart B (up to date as of 10/10/2024)