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Service bulletin 34-085

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 id10173212
Published by NHTSA2020-04-03
Manufacturer's number34-085
Manufacturer's date2020-03-03
NHTSA componentVEHICLE SPEED CONTROL; ELECTRICAL SYSTEM

NHTSA's summary

Information Only – Vehicles may have the connector seals on the wheel speed sensor incorrectly installed, which may lead to water intrusion and corrosion in some vehicles.

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, Throttle and cruise control

Vehicles listed
KENWORTH 542007
KENWORTH 9532008
KENWORTH 9632011 to 2016
KENWORTH AEROCAB2008
KENWORTH C5002004, 2005
KENWORTH C5002006 to 2018
KENWORTH C5102007
KENWORTH C5402011 to 2016
KENWORTH C548CH2008 to 2009
KENWORTH C5502011 to 2016
KENWORTH K1002004
KENWORTH K1702016
KENWORTH K2702010 to 2018
KENWORTH K3002012, 2013, 2014, 2015, 2016
KENWORTH K3702010 to 2018
KENWORTH K5002008
KENWORTH K5002011 to 2012
KENWORTH MB 552005 to 2007
KENWORTH T1702007 to 2008
KENWORTH T1702012 to 2018
KENWORTH T20002004, 2005
KENWORTH T20002006 to 2012
KENWORTH T2702007 to 2018
KENWORTH T3002004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
KENWORTH T3702007 to 2018
KENWORTH T4002011
KENWORTH T4002013 to 2015
KENWORTH T4402010 to 2018
KENWORTH T4702009 to 2017
KENWORTH T6002004, 2005
KENWORTH T6002006 to 2011
KENWORTH T6002013
KENWORTH T6002017 to 2018
KENWORTH T6602004 to 2018
KENWORTH T6802011, 2012, 2013, 2014, 2015, 2016, 2017, 2018
KENWORTH T7002007 to 2014
KENWORTH T8002004, 2005
KENWORTH T8002006 to 2018
KENWORTH T8802011, 2012, 2013, 2014, 2015, 2016, 2017, 2018
KENWORTH W9002004, 2005
KENWORTH W9002006 to 2018
KENWORTH W900S2010
PACCAR C5402012 to 2016
PACCAR MX-112013 to 2017
PACCAR MX-132011 to 2017
PETERBILT 2012005
PETERBILT 2102008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018
PETERBILT 2202015, 2016, 2017, 2018
PETERBILT 3202004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018
PETERBILT 3252008
PETERBILT 3252010, 2011
PETERBILT 3252014, 2015, 2016, 2017, 2018
PETERBILT 3302004, 2005
PETERBILT 3302007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018
PETERBILT 3352005, 2006, 2007, 2008, 2009, 2010, 2011
PETERBILT 3362008
PETERBILT 3372008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018
PETERBILT 3402006, 2007, 2008, 2009, 2010, 2011
PETERBILT 3482008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018
PETERBILT 3572004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016
PETERBILT 3622004, 2005
PETERBILT 3652004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018
PETERBILT 3672004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018
PETERBILT 3722004
PETERBILT 3782004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016
PETERBILT 3792004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016
PETERBILT 379K2007, 2008 (the catalog's model; the bulletin names a series or trim of it)
PETERBILT 3822006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016
PETERBILT 3842007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018
PETERBILT 3852004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016
PETERBILT 3862004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018
PETERBILT 3872004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016
PETERBILT 3882004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018
PETERBILT 3892004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018
PETERBILT 389G2016 (the catalog's model; the bulletin names a series or trim of it)
PETERBILT 389K2008, 2009 (the catalog's model; the bulletin names a series or trim of it)
PETERBILT 389K2014 (the catalog's model; the bulletin names a series or trim of it)
PETERBILT 3982008
PETERBILT 5202004 to 2016
PETERBILT 5202017, 2018
PETERBILT 5672006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018
PETERBILT 5792006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018
PETERBILT 5872006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018
PETERBILT MODEL 2202008 to 2014

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

Recalls for the same vehicles and component
20200902020-03-05. Electrical
20V1300002020-03-04. ELECTRICAL SYSTEM:12V/24V/48V BATTERY:CABLES
16V4260002016-06-10. ELECTRICAL SYSTEM:IGNITION:MODULE
15V5970002015-09-24. ELECTRICAL SYSTEM:IGNITION:MODULE; ENGINE AND ENGINE COOLING:ENGINE
15V4560002015-07-22. ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR
20153172015-07-20. Electrical
20151892015-05-08. Electrical
15V2700002015-05-08. ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR
15V2060002015-04-07. VEHICLE SPEED CONTROL:CRUISE CONTROL
20143052014-07-22. Electrical

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
E3242026-07-22. Service bulletin. The campaign expiration date has been changed to 03/01/2027.
E3262026-05-06. Emissions. EPA17-24 MX Fuel Injector Connector - This bulletin has been revised to include all EPA17-24 and CARB24 PACCAR MX engines.
E3242025-09-03. Service campaign. "Campaign New and improved software is now required for chassis equipped with an Engine Model Year 2016 PACCAR MX-13 engine to maintain DEF sensor performance and ensure compliance with emissions standards.
32-0192023-03-01. Service bulletin. Fix As Fail – Chassis that were manufactured with certain battery cable routing brackets may experience rubbing or chafing of the battery cables.
34-0932022-12-05. Service bulletin. 34-093 Model 389 78-inch Sleeper 12V Power Port Supplier Change
23-0052022-11-04. Service bulletin. Clutch pedal linkage lubrication service interval information is missing from the Service manual for Model 365, 367, and 389 chassis.
26-0372021-01-06. Service bulletin. 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.
02-1582020-09-03. Service bulletin. Fix as Fail: Peterbilt has determined that certain model 348, 365, 367, 382, 384, 386, 388, 389, 567, 579, and 587 trucks, built between 4/13/2010 and 3/16/2020 and equipped with a flush mounted battery box, utilized rubber washers that could rub through and cause the aluminum box mounting tabs to rub directly on the steel frame brackets. This could result in cracked battery box mounting angles. Resolution is to add the reinforcement bracket(s) to affected vehicles.
32-0152020-07-03. Service bulletin. 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 incomplete information.
20PBA2020-05-06. Service bulletin. "Safety Recall: NHTSA recall number is 20V130. A defect, which relates to motor vehicle safety, may exist in certain Model 365, 389, 567, and 579 vehicles manufactured between April 18, 2014 and March 09, 2020 with a left-hand under hood jumper start terminal. Jumper terminal battery cables may be too long, or eligible for improved routing. Battery cables that are too long may chafe against the left front suspension leaf spring, which could cause a short circuit, fire under the hood, or increased risk of crash. "