24KWL/PBL
Service Bulletin/Repair Instructions
The verbiage in the Introduction section has been updated.
Vehicle report
2022 PETERBILT 520
Service bulletins
38 bulletinsTechnical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.
43-088
Service Bulletin/Repair Instructions
The procedure has been updated to include additional steps for verifying the software level on the vehicle electronic control unit (VECU2) and digital display (DD). Steps have also been added to the PACCAR Common Rail Injection 2 (PCI2) software verification.
46-020
Service Bulletin/Repair Instructions
Certain unaffected chassis have been removed from the chassis population.
E318
Service Bulletin/Repair Instructions
The Condition, Chassis Affected, Service Action, Warranty, and Procedure sections have been updated to include the latest prognostics bulletin verbiage. The Warranty section has also been updated to include Peterbilt specific SRT codes for filing cross-division repairs.
25KWD 25PBD
Service Campaign
Additional US chassis have been added, along with additional Canadian chassis under identical safety recall 26PACB.
26PACB
Service Campaign
(KW): Certain Kenworth K270 and K370 Battery Electric Vehicle (BEV) chassis equipped with certain DANA cradle harnesses may intermittently lose electrical continuity at one or more C40 connector pins. This can occur without warning and cause loss of propulsion, increasing the risk of a crash. Certified BEV technicians will inspect the C40 connector and replace the cradle harness, if necessary. This safety recall defect is identical to 25KWD and applies to certain Canadian chassis added on 07/02/2026. (PB): Certain Peterbilt Model 220 Battery Electric Vehicle (BEV) chassis equipped with certain DANA cradle harnesses may intermittently lose electrical continuity at one or more C40 connector pins. This can occur without warning and cause loss of propulsion, increasing the risk of a crash. Certified BEV technicians will inspect the C40 connector and replace the cradle harness, if necessary. This safety recall defect is identical to 25PBD and applies to certain Canadian chassis added on 07/02/2026.
CE031
Warranty Program/Extension
KW & PB 14 fuel injector part numbers (seven for MX-11 and seven for MX-13 engines) have been added to this warranty policy.
43-080
Service Bulletin/Repair Instructions
KW: A new recommended repair has been added to verify the software level and close the campaign in SIR.The repair procedure has been updated with additional note boxes for clear instructions. PB: The repair procedure has been updated with additional note boxes for clear instructions.
46-028
Service Campaign
Certain Peterbilt Model 520 BEV chassis with an Accelera Power Control and Accessory System (PCAS) were manufactured without a check valve in the power steering system.
E338
Service Campaign
Certain EPA21 PACCAR MX engines are equipped with PHINIA fuel injectors that do not meet PHINIA’s manufacturing specifications.
E326
Emissions
EPA17-24 MX Fuel Injector Connector - This bulletin has been revised to include all EPA17-24 and CARB24 PACCAR MX engines.
22KWE/PBE
Service Bulletin/Repair Instructions
Sheppard Recall Order Process Update - The Parts section has been updated with revised steps for opening a TCS365 Order Support – Order Inquiry case.
E334
Emissions
Certain vehicle model year 2022 Kenworth chassis equipped with Engine Model Year (EMY) 2021 PACCAR MX engines may have an exempt engine label installed.
01-090
Service Bulletin/Repair Instructions
Repair procedures and warranty information for model 520EV are now available. The cab heater coolant system on Peterbilt 579EV and 520EV models may not deaerate properly, causing pump malfunctions and inadequate cab heating. Update coolant deaeration return line parts and procedures are now available to release trapped air back to the reservoir.
46-019
Service Bulletin/Repair Instructions
Repair procedures and warranty information for model 520EV are now available. Certain Peterbilt 579EV and 520EV chassis have the First Responder Guide (FRG) label incorrectly showing the cut loop on the wrong side and are missing the Low Voltage Battery Disconnect Switch and Do Not Jump Start labels. These labels are now available for installation.
98-030
Service Bulletin/Repair Instructions
5/29/2025: A new Ethernet Multiplexed Architecture (EMUX) Service Tool Kit service manual (SM034-022) has been released to provide general use information. The new EMUX Service Tool Kit improves cab & chassis electrical troubleshooting efficiency, while reducing risk of component damage. 4/29/2025: The Ethernet Multiplexed Architecture (EMUX) Service Tool Kit and individual kit components are now available to order. Dealers that have received their first kit may order an additional kit. The EMUX Service Tool Kit Part number has been updated to match OEM drawings (P74-1045-001). Individual kit component part numbers can be found in the Reference Bill of Materials sheet. The new EMUX Service Tool Kit improves cab & chassis electrical troubleshooting efficiency, while reducing risk of component damage. Information Only New diagnostic tool is required to support PACCAR Ethernet Multiplexed Architecture (EMUX). The EMUX Service Tool Kit will help improve cab & chassis electrical troubleshooting efficiency, while reducing the risk of component damage.
25PBC
Service Bulletin/Repair Instructions
Certain Peterbilt Battery Electric Vehicle (BEV) chassis equipped with certain Accelera High Voltage Interlock Loop(HVIL) circuit configurations may experience a sudden loss of high voltage power with unintended opening of electrical contractors, which may occur without warning. This can result in a loss of propulsion and may increase the risk of a crash. Software version verification, along with the installation of an upgraded circuit overlay harness kit, is required to address this issue.
46-016
Service Campaign
4/29/2025: Campaign A software update is available for 520EV and 579EV Battery Electric Vehicles. 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.
43-080 PB
Service Campaign
As of 03/25/2025, this campaign has resumed. Software updates are now available to complete this campaign.
E327
Emissions
Vehicles equipped with PACCAR MX engines with Engine Software Version NA202 or NA206 may display a dash STOP lamp incorrectly. PCI-2 software on these chassis must be reverted from NA202 to NA201 (Pack 2 injectors) or from NA206 to NA191 (Pack 1 injectors) to prevent incorrect STOP lamp display. 11014768 20250304 E327 20250227 E327 Emissions PETERBILT 367 2023 ENGINE Vehicles equipped with PACCAR MX engines with Engine Software Version NA202 or NA206 may display a dash STOP lamp incorrectly. PCI-2 software on these chassis must be reverted from NA202 to NA201 (Pack 2 injectors) or from NA206 to NA191 (Pack 1 injectors) to prevent incorrect STOP lamp display.
46-013
Service Campaign
Certain Peterbilt 579EV and 520EV Battery Electric Vehicles were built prior to the availability of certain labels and Low Voltage Distribution System (LVDS) Components. Affected chassis will be inspected and necessary components will be installed.
24PBL
Service Bulletin/Repair Instructions
Safety Recall Updated software and procedures are now available. Certain Vehicle Model Year 2021-2025 Peterbilt chassis configured for trailer towing require a software update for the Bendix EC80 ABS ECU. Software update procedures for certain Battery-Electric Vehicles (BEV) and EC80 ABS ECU part numbers are not yet available. This bulletin will be updated when software update procedures are available for these chassis. Safety Recall publish date: 1/10/25
46-011
Service Bulletin/Repair Instructions
Some 579EV and 520EV BEV trucks may have loose or improperly torqued ESS gland nuts. This may cause an intermittent warning light on the dash display.
32-025
Service Bulletin/Repair Instructions
Info Only Unnecessary starter replacements can result from customer complaints regarding engine starting issues. 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.
E290
Service Bulletin/Repair Instructions
FIX-AS-FAIL Updated to include EPA2024 compliant engines. Fuel Filters must be changed before first cleaning. EPA2021 injector cleaning is referenced in RMI for certain injector faults. Complete the procedures in E290. Discard any previous versions of E290 procedures – always use the most current document from the link in the bulletin.
46-014
Service Bulletin/Repair Instructions
Information Only Storage guideline procedures are now available for both Medium Duty and Heavy-Duty Battery Electric Vehicles.
16-044
Service Bulletin/Repair Instructions
Fix As Fail The height control valve (HCV) rod on vehicles with low air leaf suspensions is prone to toggling over center during rough road conditions. 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.
CE019
Service Bulletin/Repair Instructions
07/24/2024 - Updated the Emissions Warranty Coverage tables. Added new coverage tables and PartsLists for GHG/Vehicle Parts and ZEP/BEV Parts. 03/07/2022 - New Emissions bulletin which consolidates older versions and accounts for new CARBemissions requirements that go into effect with Engine Model Year 2022.
46-003
Service Bulletin/Repair Instructions
A software fix for model 520EV that are not equipped with ESP (Stability Control) is now available. The currently available soft ware, part number:SCM_1p5_BC_R5p00_003, will address issues caused by software version R5.00_002 that affect Peterbilt Model 520EV. The software update will correct the following issues: 1.) Power gauge displays axle RPM instead of power draw, 2.) Air conditioning compressor is inoperative below 10 mph (16 kmh) and over 40 mph (65 kmh), 3.) Low air and low coolant audible alarms (buzzers) are inoperative below 10 mph (16 kmh), and 4.) (520EV Only) Does not charge without ignition in on position.
E306
Service Bulletin/Repair Instructions
Incorrect fuel filter drain and replacement procedures on EPA21 MX-11 and MX-13 engines can result in the following: .Debris and contaminants introduced into the high-pressure fuel system. .Denial of warranty claims for injector and/or fuel system faults. .Misfire, rough running, engine knock, and other associated faults and symptoms. Correct fuel filter procedures are outlined in attached service documentation.
45-066
Service Bulletin/Repair Instructions
A testing procedure has been created for the coolant level sensor on model 520.
E300
Service Bulletin/Repair Instructions
PACCAR will reimburse customers for the local purchase of in-tank fuel additive for EPA2021 compliant MX engines. This is a one-time reimbursement. Only customers who have received E290 injector cleaning qualify for this reimbursement. See bulletin for limits and purchase tracking requirements.
45-064
Service Bulletin/Repair Instructions
Info Only - PACCAR is introducing Over-the-Air (OTA) software updates for engine MY17 and newer chassis equipped with 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.
13-060
Service Bulletin/Repair Instructions
The service information for Bendix Air Dryer maintenance is being updated to include new procedures.
E297
Service Bulletin/Repair Instructions
When updating the software on a truck to RC6 or higher, please ensure a PM sensor is physically installed before performing the software update.
01-085
Service Bulletin/Repair Instructions
Info Only â Certain 520 model chassis built between 2014 and 2021, and equipped with the Red Dot HVAC system, may have service port spacing which will not allow the connection of a pressure gauge to both the high and low side service ports simultaneously. A specific tool is available from the supplier that will allow a technician to bypass this design issue.
E287
Service Bulletin/Repair Instructions
Emissions Recall - Distance With MIL On and Distance Since DTC Cleared counters read zero when viewed in DAVIE4 (DM21). Slow or no response from PCI-2 when requesting freeze frame data using DAVIE4 (DM25).
E285
Service Bulletin/Repair Instructions
Emissions Recall: Engine Model Year 2021 MX engines built to EPA 21 emission standards (MY21B) and manufactured without a Particulate Matter (PM) sensor are required to have a PM sensor installed and the engine software updated. This is required for chassis to comply with current emissions standards.
Reading this report
Complaint counts are reports filed with NHTSA, not failure rates. A common model collects more of them than a rare one that breaks more often.