Engineering · J1939 SAE Library

Every PGN. Every SPN. Every FMI.

The full SAE J1939 library — built in. AI-decode of multipack messages, DM1/DM2/DM4 active faults, and engine-grade signal interpretation across every commercial vehicle protocol.

Live Decode Sample

PGN 65262 · 0xFEEE · Engine Temperature 1

PGN 65262 / 0xFEEE Engine Temperature 1

SPN 110Coolant Temp87 °C

SPN 174Fuel Temp 142 °C

SPN 175Oil Temp 195 °C

SPN 52Intercooler Temp58 °C

SPN 1136ECU Temp61 °C

SPN 1638Hyd. Oil Temp71 °C

SAE J1939Standard

DM1–4Active Faults

BAM/CTSMultipack Decode

0Active DTCs

Capabilities

Engine-grade signal interpretation, out of the box.

Every commercial vehicle protocol covered. No DBC authoring required for the SAE-defined surface.

Full PGN / SPN catalog

Every parameter group and signal in the J1939 standard, name-resolved. Coolant, fuel, oil, intercooler, ECU, transmission, ABS, retarder — already decoded.

Multipack BAM / CTS

Multi-frame messages reassembled at the edge. No truncation. No partial decodes. Long DM messages and broadcasts arrive intact.

DM1 · DM2 · DM4

Active diagnostic trouble codes (DM1), previously active (DM2), and freeze-frame data on intermittent faults (DM4) — interpreted into actionable events.

FMI interpretation

Failure Mode Identifiers translated to plain-language failure types. "FMI 5 — current below normal" instead of "0x05".

OEM extensions

Manufacturer-specific PGNs layered on top of the SAE library — Cummins, Detroit Diesel, Volvo, PACCAR, and more — without breaking the canonical decode.

Wayne-ready

Every decoded signal flows directly into Wayne AI's reasoning context. Ask in plain English; get answers grounded in the J1939 wire data.