2019 Peterbilt 579 TSBs

warranty policy.

engines.

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.

A new Starter Troubleshooting Guide has been created to provide a comprehensive list of starting system checks, which should reduce unnecessary starter replacements and associated warranty claims. Engine starting system warranty claims now require a completed Starter Checklist, a Battery Pack Midtronics Report, and a Cable Drop Midtronics Report. Claims filed without these documents may be denied.

With full suspension articulation, HCV bracket flexes and toggles over center the HCV linkage, which results in either deflated airbags or makes them unable to inflate. Fix-as-fail start date is 07/30/2024.

contamination during assembly.

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.

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.

(HCV) arm may be rubbing on other components when the bend in the arm is facing outboard. Flipping the bend in the HCV arm inboard prevents the rub.

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.

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. "

certain Model 365, 389, 567, and 579 vehicles manufactured between April 18, 2014 and September 30, 2019 with a left-hand under hood jumper start terminal. Your vehicle may have jumper terminal battery cables that are too long, or are 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.

Cummins engines and Eaton Endurant transmissions had the Enable PTO parameter incorrectly set. Fault code 900 may present and the PTO does not function as intended. Resolution is to update the ECU software and endable the Endurant PTO 1 1939 parameter.

An improved suction line has been released to alleviate the stress that may cause a cracked evaporator core

potentially cause damage to the engine harness and must be removed.

at the engine or fuel tank, which may introduce air into the fuel system resulting in a hard-to-start or no-start condition.

Brass fittings are available to replace the composite fittings.

with this feature enabled.

This software update corrects or improves certain functions. Software update procedures have been revised. Campaign start date is 12/05/2024. Campaign A software update is available for 520EV and 579EV Battery Electric Vehicles. This software update corrects or improves certain functions. Campaign start date is 12/05/2024.

Pressure Sensors for MX-13 -2, EMY19 Per Environment and Climate Change Canada (ECCC) regulations and guidance (Canadian Environmental Protection Act, 1999 (CEPA)), a letter has been provided to owners of Canadian registered chassis that provides a list of emissions components that have been reported (to ECCC) as having a defect.

causing possible damage.

chafing of the battery cables.

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.

A VECU software update is available to resolve the issue.

Updated VECU software is available to resolve the issue.

appropriate tests for battery warranty are performed in order to prevent battery warranty claims filed with incorrect or incomplete information.

03/6/2006 to 1/20/2020, the clamps that secure the SOC exhaust stacks may not be tightened properly. This may allow the exhaust stack to rotate and contact the cab or sleeper.

to repeated door open and close cycles. Resolution is to replace the door harness with a more robust designed harness if a failure is experienced.

Espar fuel fire heater and SmartAir may have an auto On/Off malfunction at lower temperatures. User may experience lack of heat function on SmartAir if the set temperature is < 76 F. Resolution is to install a jumper harness.

Espar fuel fire heater and SmartAir may have temperature overshoot issue. User may experience higher sleeper interior temperature than the set temperature on the SmartAir control. Resolution is to install an additional external temperature sensor on the sleeper control panel.

A procedure for installing a V-CAN overlay will correct this issue.

A battery box closeout has been designed and when installed will prevent debris from entering the battery box.

Resolution is to update the CECU software.

latest prognostics bulletin verbiage.

This is not a stand-alone procedure. Cummins Quickserve troubleshooting will specify the use of these procedures while troubleshooting specific fault codes.

Service Information Record (SIR) at the time of RO open date to qualify. Also, Through Standard Warranty or any applicable active Extended Warranty verbiage was removed from Warranty section.

Recommended Repair T016C has been updated from 6.4 hours to 6.9 hours. SRT codes updated in PRWS Claim Coding Table: B25-17A for 6.9 hours created to replace all other codes. 26-040: Warranty section updated to include 0.5 hours for test drive. Recommended Repair 26040C has been updated from 6.4 hours to 6.9 hours. SRT codes updated in PRWS Claim Coding Table: B25-17A for 6.9 hours created to replace all other codes.

The issue can be temporarily resolved using any one of the included procedures.

Notice to dealers to replace this version with older software version until Bendix introduces new version.

Oil from the air shift cover of the PTO may leak into the air line, causing the EOA solenoid to become inoperative.

Premature Main Drive Gear damage may occur due to clutch housing and main case countershaft bearing bore wear.

and main case countershaft bearing bore wear. A Clutch Housing Front Cover Kit will be installed to address the issue.

(LCA) fault codes leading to possible LCA hardware replacement.

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.

codes leading to possible LCA hardware replacement.

5/01/2017 and 4/07/2019, may have a fluid pressure sensor rubbing or experiencing hard interference with routing brackets, power cables, wiring harnesses, or air lines in the drivers side frame rail.

and/or have clutch release problems due to broken clutch levers. Resolution is to replace the clutch.

steering fluid loss.

Total chassis population is 732.

Inspection Program (PSIP) and Heavy Duty Vehicle Inspection Program (HDVIP).

quality components.

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."

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.

may experience bracket failure causing the bracket and camera to fall from the windshield.

fatigue from external forces such as reverse towing.

Washer pumps may fail to spray due to a clogged filter.

The HVAC may intermittently stop blowing cold air, typically after a truck restart. Driver may notice the system returns to normal after key cycle. The remedy is updating HVAC software.

A/C compressor.

changes in fan speed that can be remedied with an updated HVAC software.

The work brake (also known as winch brake) may unintentionally disengage during winching operations, releasing the service brakes, increasing the risk of crash or injury. The VECU software will be updated to correctly set the speed interlock parameter.

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.

NHTSA recall number is 20V199 Non compliance to FMVSS and CMVSS 121 and 136. Resolution is to Reflash software.

the headlamps, fog lamps or turn signals are not on. This is non-compliant with Canadian Regulation CMVSS 108, which states that the DRLs must be on while the vehicle is in motion without certain other lamps being activated. This bulletin will be updated when a repair is available.

January 01, 2017 and July 06, 2020. Torsional vibration may stress the currently-installed brackets and cause them to fail near the bottom of the frame rail.

lamp and reflex reflector.

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.

A redesigned bracket can be purchased that relocates the marker bracket to the front fuel tank bracket to eliminate interference.

The driver could be unaware of an issue with the methane detection system or excessive methane present, increasing the risk of a fire, crash and/or personal injury. The repair procedure will be added when it is available.

parked trailer.

A software update is available to resolve this issue.

built between March 27, 2012 and January 20, 2019 with Flex Air suspension in a 6x2 configuration have U-bolts that may fail prematurely.