22PBG – Electrical Short Circuit May Cause Engine Stall – 2023 Peterbilt 220, 389, 520, 536, 537, 348, 367, 567, 548, 579

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22PBG – Cummins ECM Short-Circuit Number 22PBG Supplier Cummins Description Cummins ECM Short-Circuit Date 9/30/2022 What’s New Safety Recall – Reference Cummins Recall C2614. On Cummins X15, PX7, and PX9 engines, the ECM may experience an internal short circuit which can result in an unexpected engine shutdown. If this occurs, the engine cannot be restarted until replacement of the ECM and, if necessary, the fuse. Introduction On certain Cummins engines, the Engine Control Module (ECM) may experience an internal short circuit which can result in an unexpected engine shutdown. If this occurs, the engine cannot be restarted until replacement of the ECM and, if necessary, the fuse. Reference Cummins Recall C2614. An unexpected engine shutdown without the ability to restart the engine may lead to an increased risk of a crash. No audible or visual warning is available. Situation 943 (836 US and 107 CAN) Model year 2023 220, 348, 367, 389, 520, 536, 537, 548, 567, and 579 chassis equipped with Cummins X15, X12, L9, or B6.7 engines with suspect ECMs. Resolution Safety Recall Go to Cummins QuickServe and refer to Cummins Recall C2614. Service all chassis affected that enter your dealership, even if the customer has no issue with the chassis. 1. Review the attached chassis list for your dealer code and schedule your customer(s) for service if their chassis is on the list. 2. If you are not using Service Management to start repair orders, review SIR for “Complete” next to the Cummins C2614 Campaign code prior to performing this repair. 3. Follow the procedures in Cummins C2614 Safety Recall to replace the ECM. Federal Law It is a violation of Federal law for a dealer to sell or lease new vehicles covere il the defect or noncompliance has been corrected. Warranty Go to Cummins QuickServe and refer to Cummins Recall C2614. File warranty claims through the Cummins Warranty System. SIR will show C2614 in the Campaign field for the chassis affected by this recall. Links Chassis/Dealer List Cummins Safety Campaign Notification C2614

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Cummins Inc. Box 3005 Columbus, IN 47202 – 3005 USA Mail Code: 40911 Phone: 1 800 CUMMINS care cummins.com *** IMPORTANT SAFETY RECALL*** NHTSA Recall No. 22E-063 Cummins Campaign #C2614 September 26, 2022 Dear Cummins Customer: This notice is sent to you in accordance with the requirements of the National Traffic and Motor Vehicle Safety Act. Cummins Inc. has decided that a defect which relates to motor vehicle safety exists in certain Cummins B6.7, L9, X12 and X15 engines that were manufactured between May 13, 2022 and June 28, 2022. This notice applies to the engine(s) listed on the enclosed table. WHAT IS THE PROBLEM? Your engine is equipped with an Engine Control Module (ECM) that may have a manufacturing defect that could result in an engine stall without warning. An unexpected engine stall without the ability to restart the engine may lead to an increased risk of a crash. WHAT ARE WE DOING ABOUT THE PROBLEM? Cummins has released Safety Campaign #C2614 CM2450 ECM Replacement Safety Campaign to address this condition by replacing the ECM. This campaign is currently available at Cummins Distributors and authorized Warranty Dealers. The repair will be completed free of charge and most applications will require approximately 1.3 hours to complete. WHAT SHOULD YOU DO? Contact the nearest Cummins Distributor or authorized Warranty Dealer to arrange to have this safety action performed on your engine(s). The distributor or dealer will work with you to schedule the best date to complete this repair. If you have not registered your Cummins product, please complete the enclosed registration card or register your product at https://prodreg.cummins.com/prodreg/#/webform/contactInfo. If you are no longer the owner of the engine(s) listed on the enclosed table, please forward this notice to the new owner or provide the new owner’s contact information to Cummins so that we can notify them of this recall. Federal law requires vehicle lessors receiving this recall notice to forward a copy of this notice to the lessee within ten (10) days. Also, it is a violation of Federal law for a dealer to deliver a new vehicle or equipment covered by this recall notice under a sale or lease until the defect has been remedied. Cummins Inc. Box 3005 Columbus, IN 47202 – 3005 USA Mail Code: 40911 Phone: 1 800 CUMMINS care cummins.com *** IMPORTANT SAFETY RECALL*** NHTSA Recall No. 22E-063 Cummins Campaign #C2614 If you previously paid to have this recall performed on your vehicle, you may be eligible for reimbursement. Please contact Cummins Care at the number below for more information. WHO SHOULD YOU CONTACT IF YOU HAVE FURTHER QUESTIONS OR CONCERNS? If you have questions or concerns about this recall, please contact your local Cummins Distributor or authorized warranty dealer. You may also contact Cummins Care at 1-800-CUMMINS (1-800- 286-6467), or visit our website at care.cummins.com. If you have a complaint relative to this recall, you may report it to the following: Administrator National Highway Traffic Safety Administration 1200 New Jersey Avenue, SE Washington, DC 20590 You may also call the toll-free Vehicle Safety Hotline at 1-888-327-4236 (TTY: 1-800-424-9153); or go to http://www.safercar.gov. Cummins is taking this action in the interest of your safety and satisfaction with our products. We apologize for any inconvenience and thank you for your attention to this matter. Sincerely, Campaign Administrator Cummins Inc.

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-631 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : PACCAR Incorporated Submission Date : AUG 17, 2022 NHTSA Recall No. : 22V-631 Manufacturer Recall No. : 22KWG and 22PBG Manufacturer Information : Manufacturer Name : PACCAR Incorporated Address : 777 106TH AVENUE NORTHEAST BELLEVUE WA 98004 Company phone : 940 591 4220 Population : Number of potentially involved : 1,601 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2023-2023 Kenworth T680 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : The vehicles include engines with suspect serial numbers provided by Cummins. Production Dates : MAY 24, 2022 – JUN 24, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 2 : 2023-2023 Kenworth K270 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : The vehicles include engines with suspect serial numbers provided by Cummins. Production Dates : JUN 01, 2022 – JUN 01, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 3 : 2023-2023 Kenworth T440 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : The vehicles include engines with suspect serial numbers provided by Cummins. Production Dates : MAY 30, 2022 – JUN 15, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 22V-631 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Vehicle 4 : 2023-2023 Kenworth T880 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : The vehicles include engines with suspect serial numbers provided by Cummins. Production Dates : MAY 23, 2022 – JUL 08, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 5 : 2023-2023 Kenworth W990 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : The vehicles include engines with suspect serial numbers provided by Cummins. Production Dates : MAY 26, 2022 – JUN 17, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 6 : 2023-2023 Peterbilt 220 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : The vehicles include engines with suspect serial numbers provided by Cummins. Production Dates : MAY 30, 2022 – JUN 15, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 7 : 2023-2023 Kenworth K370 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : The vehicles include engines with suspect serial numbers provided by Cummins. Production Dates : JUN 14, 2022 – JUN 14, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 8 : 2023-2023 Kenworth T280 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : The vehicles include engines with suspect serial numbers provided by Cummins. Production Dates : MAY 25, 2022 – JUN 20, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 22V-631 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Vehicle 9 : 2023-2023 Kenworth T380 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : The vehicles include engines with suspect serial numbers provided by Cummins. Production Dates : MAY 19, 2022 – JUN 21, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 10 : 2023-2023 Kenworth T480 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : The vehicles include engines with suspect serial numbers provided by Cummins. Production Dates : MAY 30, 2022 – JUN 15, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 11 : 2023-2023 Kenworth T800 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : The vehicles include engines with suspect serial numbers provided by Cummins. Production Dates : JUN 06, 2022 – JUL 07, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 12 : 2023-2023 Kenworth W900 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : The vehicles include engines with suspect serial numbers provided by Cummins. Production Dates : JUN 02, 2022 – JUL 07, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 13 : 2023-2023 Peterbilt 389 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : The vehicles include engines with suspect serial numbers provided by Cummins. Production Dates : MAY 27, 2022 – JUN 23, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 22V-631 Page 4 The information contained in this report was submitted pursuant to 49 CFR §573 Vehicle 14 : 2023-2023 Peterbilt 520 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : The vehicles include engines with suspect serial numbers provided by Cummins. Production Dates : MAY 30, 2022 – JUN 22, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 15 : 2023-2023 Peterbilt 536 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : The vehicles include engines with suspect serial numbers provided by Cummins. Production Dates : MAY 26, 2022 – JUN 16, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 16 : 2023-2023 Peterbilt 537 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : The vehicles include engines with suspect serial numbers provided by Cummins. Production Dates : MAY 19, 2022 – JUN 20, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 17 : 2023-2023 Peterbilt 348 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : The vehicles include engines with suspect serial numbers provided by Cummins. Production Dates : MAY 27, 2022 – MAY 31, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 18 : 2023-2023 Peterbilt 367 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : The vehicles include engines with suspect serial numbers provided by Cummins. Production Dates : JUN 01, 2022 – JUN 10, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 22V-631 Page 5 The information contained in this report was submitted pursuant to 49 CFR §573 Vehicle 19 : 2023-2023 Peterbilt 567 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : The vehicles include engines with suspect serial numbers provided by Cummins. Production Dates : MAY 26, 2022 – JUN 24, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 20 : 2023-2023 Peterbilt 548 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : The vehicles include engines with suspect serial numbers provided by Cummins. Production Dates : MAY 27, 2022 – JUN 13, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 21 : 2023-2023 Peterbilt 579 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : The vehicles include engines with suspect serial numbers provided by Cummins. Production Dates : MAY 26, 2022 – JUN 27, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : The ECM may experience an internal short circuit which can result in an unexpected engine shutdown. If this occurs, the engine cannot be restarted until replacement of the ECM and, if necessary, the fuse. Reference Cummins recall 22E-063. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : An unexpected engine shutdown without the ability to restart the engine may lead to an increased risk of a crash. Description of the Cause : A screw in the supplier’s selective solder fixture backed out of position, pushing an electrolytic capacitor frame into the Printed Circuit Board (PCB) during ECM production, which in turn causes an internal short circuit. Identification of Any Warning that can Occur : None Part 573 Safety Recall Report 22V-631 Page 6 The information contained in this report was submitted pursuant to 49 CFR §573 Involved Components : Component Name 1 : Module, Electronic Control Component Description : Engine Control Module Component Part Number : CM2450A (5572391) Supplier Identification : Component Manufacturer Name : Cummins Address : Box 3005, Mail Code 41303 Columbus Indiana 47202 Country : United States Chronology : 07-25-2022: Cummins notified Paccar that they plan to file a recall for an ECM failure in MY2022 diesel engines. Cummins notified Paccar that 2 non-Paccar vehicles experienced failures in the field, but no accidents or injuries were reported. Investigation opened. 07-27-2022: PACCAR and Cummins begin to review and identify affected vehicles associated with each engine serial number (ESN) provided by Cummins. 07-28-2022: Cummins filed for a 573, NHTSA recall no. 22E-063. 08-11-2022: Joint Safety Committee agreed with Cummins that a safety related defect exists. No reports of field failures on Paccar vehicles to date. Description of Remedy : Description of Remedy Program : Paccar will notify owners and dealers, and affected vehicles will have the ECM replaced. Owners who incurred costs to obtain a remedy for the problem addressed by the recall in advance of receiving notification may seek reimbursement through the process outlined in the general reimbursement plan on file. How Remedy Component Differs from Recalled Component : Remedy components were manufactured after corrective actions were put in place by the supplier, and do not include a serial number within the suspect date range. Identify How/When Recall Condition was Corrected in Production : The ECM supplier corrected the ECM production assembly process on June 2, 2022. Cummins initiated containment actions at impacted engine plants on June 28, 2022. Part 573 Safety Recall Report 22V-631 Page 7 The information contained in this report was submitted pursuant to 49 CFR §573 Recall Schedule : Description of Recall Schedule : Customers will be notified within 60 days. Planned Dealer Notification Date : OCT 16, 2022 – OCT 16, 2022 Planned Owner Notification Date : OCT 16, 2022 – OCT 16, 2022 * NR – Not Reported

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