2018 Kenworth T680 TSBs
74 Technical Service Bulletins across 12 categories
Categories
Engine
21 bulletinsAn exhaust manifold slip joint seal kit is now available for EPA 2017-2024 PACCAR MX-13 engines.
EPA17-24 MX Fuel Injector Connector - This bulletin has been revised to include all EPA17-24 and CARB24 PACCAR MX...
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engines.
EPA17-24 MX-13 Fuel Injector Connector - This bulletin has been revised to include EPA24 PACCAR MX-13 engines.
Procedure pictures updated for clarity.
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When troubleshooting Cummins X15 fault codes 555 or 556, follow this additional testing, inspection, and documentation procedure to help identify the root cause of dusted engines. This is not a stand-alone process but must be used alongside Cummins troubleshooting steps. Cummins Quickserve will reference this bulletin for fault codes 555 or 556.
"Campaign New and improved software is now required for chassis equipped with an Engine Model Year 2016 PACCAR MX-13...
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engine to maintain DEF sensor performance and ensure compliance with emissions standards.
Emissions Recall Certain Vehicle Model Year 2017-2019 chassis equipped with EPA2017 compliant PACCAR MX-13 engines have...
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an EGR flex pipe that can develop cracks and leak untreated exhaust. The EGR Flex pipe will be replaced if it has a suspect part number.
Certain chassis with Engine Model Year 2016-2021 PACCAR MX-11/MX-13, or EPA13 and EPA21 Cummins ISX12/ISX15/X15 engines...
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that had a previously failed DEF sensor and with DEF sensor software disabled due to industry DEF sensor shortages will now be able to receive a replacement DEF sensor, DEF tank heater coolant control valve, and re-enabled DEF diagnostic software. Please note that chassis equipped with PACCAR PX engines will be eligible for this repair at a future date when software is available.
E279: PACCAR MX-13/MX-11 Engine MY17 Software Incorrectly Sets DTC P1092 PACCAR MX-13/MX-11 Engine MY17 Software...
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Incorrectly Sets DTC P1092 Emission Recall - PACCAR MX-13/MX-11 MY2017 software incorrectly sets DTC P1092, which could result in reduced available engine torque and/or engine protection mode. An engine software update is available that corrects the issue.
Certain Model Year 2018 PACCAR MX-11 engines may have contaminated Crankcase Pressure Sensors.
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These sensors will be replaced.
Certain Model Year 2021-2024 chassis with PACCAR MX engines and optional fuel filter restriction virtual gauge may...
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display incorrect restriction levels. The virtual gauge will be temporarily disabled until a revised sensor strategy is developed.
This campaign is the final opportunity to replace the oil filter screw cap to reduce occurrences of broken bypass valve tabs.
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Broken oil valve tabs can cause oil flow obstruction to critical engine parts, resulting in serious engine damage. Customers that do not receive this repair may be responsible for progressive engine damage caused by broken oil bypass valve tabs.
Info Only - PACCAR is introducing Over-the-Air (OTA) software updates for engine MY17 and newer chassis equipped with...
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Cummins X15, X12, ISX12, ISX12N, L9N, PX-7, and PX-9 engines The technology will leverage the existing Remote Diagnostic cs hardware to deliver secure software updates remotely. This will reduce downtime and save on maintenance costs for eligible vehicles.
Kenworth is providing guidance for PACCAR MX Engine Composite Oil Pan leak troubleshooting to avoid over-repairs and to...
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provide warrantable repair guidance. Oil leaks, if not repaired, can lead to severe engine damage.
Non-Safety Campaign Vehicles with a Cummins X15 engine and Horton fan drive may set Diagnostic Trouble Code (DTC) 6637...
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and/or 3838 due to fan speed that results in the fan remaining activated until the power is cycled. A new controller will resolve the issue.
An engine software update is required to resolve OBD system readiness, DEF doser diagnostics, and otherOBD system...
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software related issues.
Selected engines have been identified to receive a camshaft inspection and an update for improved camshaft lubrication.
T680 predictive cruise control(PCC) incompatibility with cummins engine.
Emissions Campaign The Engine Overspeed lamp may illuminate during a smoke opacity test.
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A software update is available to resolve the issue.
Fix-As-Fail The evaporator core may crack in vehicles with the ISX-15 engine.
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An improved suction line has been released that removes stress transferred to the evaporator core.
Fix-As-Fail - Nylon fuel lines may be too short, potentially resulting in a cracked or loose, low pressure fuel fitting...
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at the engine or fuel tank, which may introduce air into the fuel system resulting in a hard-to-start or no-start condition.
Fix-As-Fail - Composite fittings used in the cooling system may crack, resulting in coolant leaks.
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Brass fittings are available to replace the composite fittings.
Electrical
15 bulletinsNon-Safety Campaign - The TPMS ECU is not communicating properly with TPMS sensors.
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The result is a delay or failure of communication between the TPMS ECU and the TPMS sensors , causing inaccurate TPMS readings. A firmware update resolves the issue.
Fix-As-Fail Due to undersupply issues, only a limited supply of Diesel Exhaust Fluid (DEF) sensors are available.
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As a temporary solution, after PACCAR confirms a DEF sensor is not available, a temporary software update will allow a vehicle to continue operation with a failed DEF sensor by disabling the DEF sensor diagnostics.
Information Only C hassis equipped with MY2021 B EPA emission s standards will be shipped through atleast ...
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the end of the 2021 calendar year without particulate matter (PM) sensors installed .
Non-Safety Campaign Chassis with the City Horn option may generate unexpected alerts.
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A VECU software update is available to resolve the issue.
Non-Safety Campaign The batteries may drain quickly due to the VECU not going to sleep.
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Updated VECU software is available to resolve the issue.
Fix-As-Fail The Battery Management System (BMS) may report the incorrect battery condition.
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Additional diagnostics are available to correctly determine and repair the root cause of the issue.
Fix-As-Fail The Master Switch Module (MSM) may lose dash switch memory and functionality when the battery disconnect switch is cycled.
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An improved MSM is available to resolve the issue.
Information Only: This bulletin provides dealers with a battery warranty quick reference guide to ensure the...
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appropriate tests for battery warranty are performed in order to prevent battery warranty claims filed with incorrect or incomplete information.
Information Only Vehicles may have the connector seals on the wheel speed sensor incorrectly installed, which may lead...
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to water intrusion and corrosion in some vehicles.
Information Only: Proper jump-starting voltage will eliminate high voltage related issues and equipment damage.
Information Only: The AutoStart System Test does not recognize the hood opening and closing when running the test on a...
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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 software update. This bulletin will be updated when the resolution is available.
Information Only - CECU/VECU unable to communicate with ESA requires use of a Y-cable.
Fix-As-Fail ? Some vehicles may set a ?Cluster Not Detected? error message when connecting to the CECU with ESA.
Non Safety Campaign: The circuit for the Trailer Hotline/Trailer Power may not be properly protected on Model T680/T880...
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vehicles equipped with this option.
Fix-As-Fail: Repair for horizontal exhaust diffuser configurations with broken brackets or cracked diffuser.
Software & Calibration
8 bulletinsThe Condition, Chassis Affected, Service Action, Warranty, and Procedure sections have been updated to include the...
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latest prognostics bulletin verbiage.
Updated Eaton's TAIB0885EN Bulletin link.
The PACCAR Powertrain Prognostics Webcast video link has been removed.
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It will be included with updated information at a later date.
Kenworth - The Warranty section has been updated to include Peterbilt-specific SRT codes for cross-division repair...
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filing.
The attached procedures document has been updated with more detail and explanations.
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This is not a stand-alone procedure. Cummins Quickserve troubleshooting will specify the use of these procedures while troubleshooting specific fault codes.
Bogie Crossmember Torque Value Update - Procedure has been updated to correct torque values.
CARB Chassis Update - Chassis list updated with 5 KW and 31 PB additional chassis.
Information Only - Vehicles built with NAMUX software from 2013 to present may experience accuracy issues with the tachometer.
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The issue can be temporarily resolved using any one of the included procedures.
Transmission
8 bulletinsNon-Safety Campaign: Drivers of vehicles equipped with PACCAR TX-12 transmissions may experience harsh shifts and gear grinding noise.
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Premature Main Drive Gear damage may occur due to clutch housing and main case countershaft bearing bore wear.
Non-Safety Campaign: Eaton Endurant transmissions may experience premature Main Drive Gear damage due to clutch housing...
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and main case countershaft bearing bore wear. A Clutch Housing Front Cover Kit will be installed to address the issue.
Fix-As-Fail - Prior versions of Eaton Endurant transmission software may be prone to setting Linear Clutch Actuator...
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(LCA) fault codes leading to possible LCA hardware replacement.
Non-safety campaign: Vehicles equipped with an Eaton Endurant 12 speed transmission may experience transmission service...
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lamp activation, no gear engagement from neutral, and/or DTC 511 FMI 7 or 10 is set. Resolution is to update the transmission software and calibrations.
Non-Safety Campaign Vehicles with PACCAR transmissions may experience transmission service lamp activation, no gear...
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engagement from neutral, and/or DTC 511 FMI 7 or 10 is set. Transmission software and shift calibration updates are available to resolve
Fix as Fail: Vehicles with Eaton Ultrashift Plus or Fuller Advantage Automated transmissions may display fault codes...
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and/or have clutch release problems due to broken clutch levers. Resolution is to replace the clutch.
Campaign: The clutch may not shift appropriately or the clutch may not disengage due to lack of torque on the clutch...
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bolts.
Non-Safety Campaign - PTOs in certain T680/T880 chassis equipped with PACCAR or an Eaton Endurant Transmission may not...
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contain the wiring required to activate the PTO accessory.
Other
5 bulletins"Kenworth: Dealers should check the chassis list and SIR weekly for VIN changes.
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2 chassis added to the chassis list. Peterbilt: Dealers should check the chassis list and SIR weekly for VIN changes. 10 chassis added to the chassis list."
DEF tank covers may become loose and potentially crack on vehicles built before October 2019 with DEF tank part number...
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M86-6221-003**(TANK-DEF MEDIUM ASSY) and M86-6222-003**(TANK-DEF LARGE, ASSY). Resolution is to resolve the vibration on the tank cover by adding bottom tank washers.
MY2018 QV/VV Retrofit
Fix-As-Fail: Two separate causes have been identified as root cause of intermittent low coolant indicator illumination.
Fix-As-Fail ? 2.1m Sunvisor clips may be cracked or broken.
Brakes
4 bulletinsCertain C500/T440/T470/T660/T680/T800/T880/W900 chassis may have air tank reservoirs that do not meet air volume...
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requirements per FMVSS/CMVSS 121 Air Brake Systems. This bulletin will be updated when repair parts and procedures are available.
Fix-As-Fail - Bendix New-Gen Lightweight Steer Axle Drum Brake Spider Cracking
Fix-As-Fail: Bendix Wingman radars with ice/snow buildup on the optional PACCAR radar cover may experience false...
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warnings and mild brake applications from the Wingman System.
Fix-As-Fail: Bendix Wingman radars with ice/snow buildup on the optional PACCAR radar cover may experience false...
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warnings and mild brake applications from the Wingman System.
Body & Paint
3 bulletinsTroubleshooting procedures for 2.1m cab power windows are now available.
Information Only Windshield washer pumps have a high No Trouble Found rate.
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Washer pumps may fail to spray due to a clogged filter.
Information Only: Proper instructions for closure of power distribution box cover to prevent corrosion.
Fuel System
3 bulletinsDue to major data carriers phasing out 3G networks, chassis currently utilizing first generation Peoplenet Mobile...
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Gateway (PMG001) will experience severe 3G service degradation as early as January of 2022. Chassis currently utilizing 3G antennas as a primary antenna may experience this degradation
Non-Safety Campaign- Incorrect GHG emissions identifier label for the tire classification listed on printed label.
Non-Safety Campaign- Incorrect GHG emissions identifier label for the tire classification listed on printed label.
HVAC & Climate
3 bulletinsInformation Only: This bulletin provides guidance for repairing an air-conditioning system after internal failure of the...
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A/C compressor.
Fix as Fail HVAC system may demonstrate inadequate temperature control, be stuck in defrost mode, or have intermittent...
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changes in fan speed that can be remedied with an updated HVAC software.
FIX-AS-FAIL: AN INTERNAL ISSUE MAY CAUSE SOME HVAC MODE DOOR ACTUATORS TO FAIL.
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THIS WILL CAUSE THE HVAC SYSTEM TO ACT ERRATICALLY OR CONSTANTLY TURN ON AND OFF.
Lighting
2 bulletinsNon-Safety Campaign- JOST International has concluded a possibility exists that one production 5th wheel built with a...
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prototype component was installed on a Kenworth chassis
Information only - Customer installed inverters may be wired incorrectly.
Steering
1 bulletinSafety Recall Interim Notification - The Dana D-Series front axle steer arm fasteners that attach the steer arm to the...
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steering knuckle may fail, increasing the risk of a crash or injury. Repair information will be added when a repair procedure and parts are available.
Pre-Delivery & Maintenance
1 bulletinInformation Only This bulletin provides information about the California Air Resources Board (CARB) Periodic Smoke...
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Inspection Program (PSIP) and Heavy Duty Vehicle Inspection Program (HDVIP).