Technical Service Bulletins
Search 172,063 manufacturer communications covering 879 vehicle makes from 1955 to 2025.
Showing 440 bulletins for KENWORTH
32-018
Feb 25, 2021
060000 ENGINE AND ENGINE COOLING
Non-Safety Campaign a?? Chassis with the City Horn option may generate unexpected alerts. A VECU software update is available to resolve the issue.
32-017
Feb 25, 2021
110000 ELECTRICAL SYSTEM
Non-Safety Campaign - The batteries may drain quickly due to the VECU not going to sleep. Software update required.
02-160
Feb 10, 2021
130000 VISIBILITY
Information Only a?? Windshield washer pumps have a high No Trouble Found rate. Washer pumps may fail to spray due to a clogged filter.
E275
Dec 22, 2020
060000 ENGINE (PWS)
Non-Safety Campaign - Vehicles included in Model Year 2021 Pre-Production Engine program have an Emissions Exemption label that must be replaced. The current Emissions Exemption label will expire on 12/31/2020 and requires a new label to ex
DOR-W5T2V-01
Dec 20, 2020
356000 EQUIPMENT ADAPTIVE/MOBILITY
This SKU is a Climate Control Module. The customer communication requested return of unsold inventory to inspect alignment pins and knobs. The alignment pins may be weak which cause them to break and knob material may be weak which could
T010
Dec 18, 2020
100000 POWER TRAIN
Non-Safety Campaign a?? 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 avai
26-037
Dec 18, 2020
100000 POWER TRAIN
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.
26-035
Dec 18, 2020
100000 POWER TRAIN
Non-safety campaign: Vehicles equipped with an Eaton Endurant 12 speed transmission may experience transmission service lamp activation, no gear engagement from neutral, and/or DTC 511 FMI 7 or 10 is set. Resolution is to update the transm
46-001
Dec 4, 2020
110000 ELECTRICAL SYSTEM
Information Only - Several models of Battery Electric Vehicles (BEV) are available to order for low volume validation builds. These vehicles require specialized PPE, tools, and training to service.
01-079
Nov 11, 2020
060000 ENGINE AND ENGINE COOLING
Fix as Fail The HVAC system, on model 579 and 567 vehicles manufactured since 1/20/2012 may have inadequate temperature control. The HVAC may intermittently stop blowing cold air, typically after a truck restart. Driver may notice the syst
32-014
Oct 12, 2020
110000 ELECTRICAL SYSTEM
Fix-As-Fail a?? The Battery Management System (BMS) may report the incorrect battery condition. Additional diagnostics are available to correctly determine and repair the root cause of the issue.
A003
Oct 9, 2020
010000 STEERING
PACCAR has determined that all Set Forward Front Axle (SFFA) models with the PACCAR 20K front steer axle and wide-based tires have the potential to experience a shimmy or shake in the front axle. Wide-based tires include any series tires wi
37-001
Aug 26, 2020
060000 ENGINE AND ENGINE COOLING
Fix-As-Fail a?? The Master Switch Module (MSM) may lose dash switch memory and functionality when the battery disconnect switch is cycled. An improved MSM is available to resolve the issue.
13-054
Jul 29, 2020
030000 BRAKES (PWS)
Fix-As-Fail - Bendix New-Gen Lightweight Steer Axle Drum Brake Spider Cracking
44-033
Jul 21, 2020
080000 FUEL SYSTEM, DIESEL
Non-Safety Campaign a?? The end cap welds on certain fuel tanks may not meet internal quality standards due to improper weld equipment settings. The fuel tanks will be replaced.
21-001
Jul 2, 2020
100000 POWER TRAIN
Non-Safety Campaign a?? Some MY2020-2021 T370s may have had the front axle filled with the incorrect gear oil at the factory. Dealers will drain the oil and fill with the correct oil.
32-015
Jun 8, 2020
110000 ELECTRICAL SYSTEM
Information Only: This bulletin provides dealers with a battery warranty quick reference guide to ensure the appropriate tests for battery warranty are performed in order to prevent battery warranty claims filed with incorrect or incomplet
43-066
Mar 27, 2020
160000 STRUCTURE
DEF tank covers may become loose and potentially crack on vehicles built before October 2019 with DEF tank part number M86-6221-003**(TANK-DEF MEDIUM ASSY) and M86-6222-003**(TANK-DEF LARGE, ASSY). Resolution is to resolve the vibration on
32-016
Mar 17, 2020
350000 EQUIPMENT
Information Only: Proper jump-starting voltage will eliminate high voltage related issues and equipment damage.
34-085
Feb 28, 2020
110000 ELECTRICAL SYSTEM
Information Only a?? Vehicles may have the connector seals on the wheel speed sensor incorrectly installed, which may lead to water intrusion and corrosion in some vehicles.
02-157
Feb 26, 2020
130000 VISIBILITY
Fix as Fail: Certain model 567 and 579 vehicles may have been built with a windshield seal that could delaminate. Vehicles built from 9/27/2019 through 2/06/2020 with windshield Julian date codes between 263 of 2019 and 031 of 2020 could b
03-072
Feb 20, 2020
118000 ELECTRICAL SYSTEM:SOFTWARE
Fix-As-Fail: The cruise control may be inoperative after installing CECU software version P30-1030-118 if the vehicle was manufactured without an air pressure sensor. Until the software is revised to address this issue, a pressure sensor mu
36-005
Jan 31, 2020
030000 BRAKES (PWS)
Information Only - Driver Performance Assistance (DPA) Coasting and Braking Scores Not Incrementing, Stays at 50%. The average score will never change nor create driver assistance popups based upon driver??A?A?s actions. A future software u
32-013
Jan 3, 2020
110000 ELECTRICAL SYSTEM
Information Only: The AutoStart System Test does not recognize the hood opening and closing when running the test on a model 579 or 567 chassis equipped with a VECU software version 9.8 and 9.9. The issue will be fixed on a future VECU sof
43-063
Dec 19, 2019
060000 ENGINE AND ENGINE COOLING
Emissions Campaign ??A?A? The Engine Overspeed lamp may illuminate during a smoke opacity test. A software update is available to resolve the issue.