This PACCAR engine DTC 18409 procedure belongs to the same twelve-code Engine Related DTCs group as DTC8409, DTC9109, DTC17102, DTC102809, DTC524502 and DTC524602, all logged by the CECU when it stops receiving an Engine Control Module message over the V-CAN J1939 datalink. Published by PACCAR under bulletin PM819003/KM815056 (09/16/2011), this sheet focuses on the second decision point in the procedure: what to do when the Electronic Service Analyst tool shows only a single or a few Engine Control Module codes rather than a large simultaneous batch. Reading the PACCAR engine DTC 18409 sheet alongside its sibling codes keeps a one-off sensor fault from being mistaken for a bus-wide failure.
Document details and specifications — PACCAR engine DTC
| Brand | PACCAR |
| Model coverage | Kenworth and Peterbilt trucks, 2011 and newer, CECU3 with Chassis Node |
| System/Group | DTCs / Cab (2011 & Newer) — Electrical System Service Manual |
| Publication no. | PM819003/KM815056 |
| Year/Revision | 09/16/2011 |
| Pages | 2 |
| File size | 0.1 MB |
| Format | |
| Language | English |
Table of contents
- Engine Related DTCs (12-code group)
- Step 1: Connect ESA, rule out simultaneous J1939 failure
- Step 2: Diagnose a single or few Engine Control Module DTCs
- Return to Table Of Contents
Applies to these models
The engine DTC 18409 sheet applies to PACCAR-built Kenworth and Peterbilt trucks with the CECU3 multiplexed electrical system, model year 2011 and newer, whenever only DTC18409 (or one or two related engine codes) shows active rather than the whole twelve-code group at once. See the PACCAR official site for platform coverage.
Who needs this engine DTC 18409 manual
Technicians who see just DTC18409 active on ESA, with no other simultaneous Engine Control Module codes, need the engine DTC 18409 guidance because it points to an individual sensor-to-ECM fault rather than a bus-wide J1939 communication loss, and directs further diagnosis to the OEM engine service information.
The full PDF is available in the DiagTechPro manuals library; a free account is required to download.
Related manuals library
