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Service bulletin 26-037

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 id10185190
Published by NHTSA2021-01-06
Manufacturer's number26-037
Manufacturer's date2020-12-18
NHTSA componentELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN; EQUIPMENT ADAPTIVE/MOBILITY

NHTSA's summary

Fix-As-Fail - Prior versions of Eaton Endurant transmission software may be prone to setting Linear Clutch Actuator (LCA) fault codes leading to possible LCA hardware replacement.

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, Equipment and accessories, Transmission and driveline, Software

Vehicles listed
KENWORTH 9632012 to 2016
KENWORTH C5002012 to 2019
KENWORTH C5402012 to 2016
KENWORTH C5502012 to 2016
KENWORTH K1702016
KENWORTH K2702012 to 2018
KENWORTH K3002012, 2013, 2014, 2015, 2016
KENWORTH K3702012 to 2018
KENWORTH K5002012
KENWORTH T1702012 to 2020
KENWORTH T20002012
KENWORTH T2702012 to 2020
KENWORTH T3702012 to 2021
KENWORTH T4002013 to 2015
KENWORTH T4402012 to 2020
KENWORTH T4702012 to 2017
KENWORTH T4702020
KENWORTH T6002013
KENWORTH T6002017 to 2019
KENWORTH T6602012 to 2019
KENWORTH T6802012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021
KENWORTH T7002012 to 2014
KENWORTH T8002012 to 2020
KENWORTH T800B2021
KENWORTH T8802012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021
KENWORTH W9002012 to 2021
PETERBILT 5672017, 2018, 2019, 2020, 2021
PETERBILT 5792018, 2019, 2020, 2021

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

Recalls for the same vehicles and component
24V9150002024-12-09. ELECTRICAL SYSTEM:SOFTWARE; SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:CONTROL UNIT/MODULE
21V9060002021-11-19. ELECTRICAL SYSTEM:SOFTWARE; SERVICE BRAKES, AIR
13V0270002013-01-25. ELECTRICAL SYSTEM:SOFTWARE; SUSPENSION:REAR:SPRINGS:AIR SUSPENSION SYSTEM

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
T0102021-01-06. Service bulletin. Non-Safety Campaign – Vehicles with PACCAR transmissions may experience transmission service lamp activation, no gear engagement from neutral, and/or DTC 511 FMI 7 or 10 is set. Transmission software and shift calibration updates are available to resolve
03-0712020-01-04. Service bulletin. Information Only - Vehicles built with NAMUX software from 2013 to present may experience accuracy issues with the tachometer. The issue can be temporarily resolved using any one of the included procedures.
03-0702019-06-11. Service bulletin. Fix as Fail: Vehicles built 11/30/15 to 7/18/16 may display an error message in the Service Advised display after updating CECU software.
13-0492019-03-18. Service bulletin. Information: Bendix ACOM Software version 6.16.5.0 for diagnostics may introduce an unrecoverable error. Notice to dealers to replace this version with older software version until Bendix introduces new version.
TIB34-0732019-03-11. Service bulletin. Fix-As-Fail: Vehicles equipped with VECU may activate frequently when LVD is enabled. Resolution is to update the CECU software.
99-0342018-05-07. Service bulletin. Information Only - CECU/VECU unable to communicate with ESA requires use of a Y-cable.
91622017-10-21. Service bulletin. Non-Safety Campaign: The Peterbilt SmartAir No Idle System may shut down during use. A software issue, corrected by replacing the control panel, has been identified as the source of this issue.
510122017-10-21. Service bulletin. Fix-as-Fail: CECU3 software P30-1011-139 software has been released. This software update is not mandatory. This software requires MY2017 PCC software when installed on MY2015/2016 vehicles equipped with PCC.
010692017-10-21. Service bulletin. Non-Safety Campaign: The Kenworth Idle Management System (KIMS) may shut down during use. A software issue, corrected by replacing the control panel, has been identified as the source of this issue.
51-0072017-02-18. Service bulletin. FIX-AS-REQUESTED - NAV+ HD SOFTWARE UPDATE FOR RANDOM REBOOT FIX AND MP3 FEATURES ENABLED.