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Service bulletin 0402-18

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10141861
Published by NHTSA2018-06-18
Manufacturer's number0402-18
Manufacturer's date2018-04-02
NHTSA componentPOWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; ELECTRICAL SYSTEM

NHTSA's summary

0402-18 SPN 625 (CPC) (GHG14)

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system, Engine, Exhaust and emissions, Transmission and driveline, Automatic transmission, Transmission control module

Vehicles listed
FREIGHTLINER 114SD2014, 2015, 2016, 2017, 2018
FREIGHTLINER 122SD2014 to 2018
FREIGHTLINER BUSINESS CLASS M22014 to 2018
FREIGHTLINER CASCADIA2014, 2015, 2016, 2017, 2018
WESTERN STAR 47002014, 2015, 2016, 2017, 2018
WESTERN STAR 49002014, 2015, 2016, 2017, 2018
WESTERN STAR 57002014, 2015, 2016, 2017, 2018
WESTERN STAR 69002014, 2015, 2016, 2017, 2018

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
17V7300002017-11-17. POWER TRAIN:AUTOMATIC TRANSMISSION

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
TechTalk76922020-11-03. Service bulletin. Tech Talk discussion for wiring a solenoid and switch for a 2016 Cascadia with PTO on a DT12 transmission.
sb601632019-04-08. Service bulletin. Adding Floor Support for Vehicles with Automatic or Automated Transmissions
0702-172019-04-01. Service bulletin. Diagnostics
0703-172019-04-01. Service bulletin. Diagnostics
0704-172019-04-01. Service bulletin. Diagnostics
0705-172019-04-01. Service bulletin. Diagnostics
D18M4 Remanufact2018-12-10. Service bulletin. Field Service Campaign: Remanufactured Detroit? DT12? Transmission
MY18M42018-10-29. Service bulletin. MY18M4-Bulletin-02-MAY-2018 Field Service Campaign D18M4
aeo18M42018-10-29. Service bulletin. aeo18M4 Field Service Campaign D18M4
0402-182018-10-01. Service bulletin. 0402-18 SPN 625 (CPC) (GHG14)