22PBH – Stability Control Commands may Fail to Processes – 2021 Peterbilt 220

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11/17/2022 To: National Highway Traffic Safety Administration (NHTSA) 1200 New Jersey Avenue, SE Washington, DC 20590 From: Customer Experience Group Peterbilt Motors 1700 Woodbrook St. Denton, TX 76205 RE: 22PBH/22KWH Recall (NHTSA #22V630) – No letters mailed – chassis fixed by supplier in the field Dear NHTSA representative, This is a rare occurrence, but the four chassis involved in this recall were repaired in the field by the supplier prior to the date by which Part 577 owner notification letters were due. Peterbilt chassis: 594199 – Repaired on October 14, 2022 594612 – Repaired on October 13, 2022 Kenworth chassis: 582653 – Repaired on August 18, 2022 582752 – Repaired on October 12, 2022 Although we uploaded a draft customer notification letter to the Portal, the final letter was never mailed because Dana, the supplier, took proactive steps to reprogram the software in the four affected vehicles, thereby obviating the need to notify customers by letter. The absence of a 577 letter prevented us from uploading a quarterly completion report for Q3 2022 to the portal, so we have amended the 573 report to explain that all affected vehicles were repaired. Please let us know if there are other steps we should take to document and communicate the completed status of the recall. Thank you, Peterbilt Customer Experience Group

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22PBH – Stability Control in Regenerative Braking NHTSA#22V630 Number 22PBH Supplier Dana Description 22PBH Stability Control in Regenerative Braking NHTSA#22V630 Date 9/19/2022 What’s New Clone Safety Recall – The electric powertrain control unit may not respond to a stability control command while the truck is in a regenerative braking mode, increasing the risk of a crash. Dana has established a repair procedure and is providing a software update to correct the issue. Introduction On certain vehicles equipped with a battery electric powertrain and stability control, the electric powertrain control unit may not respond to a stability control command while the truck is in a regenerative braking mode, increasing the risk of a crash. Situation 2 (2 US / 0 Canada) 220 chassis model year 2021 vehicles built from 03/05/2021 through 05/08/2021 with a battery electric powertrain and stability control. Resolution Affected chassis will be marked in SIR with campaign code 22PBH. This campaign code will be marked “complete” when the repairs are completed. Federal Law It is a violation of Federal law for a dealer to sell or lease new vehicles covered by this recall until the defect or noncompliance has been corrected. Warranty Repairs will be coordinated and performed by the supplier. No Warranty claim is necessary for affected vehicles. Procedure The supplier will perform the required repairs. Parts Software only. No parts required. Labor The supplier will perform the required repairs. Links 22PBH – Chassis List US Customer Letter Authored by D. Cook Revision History 10/10/2022 – Updated from Interim to Final.

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No. 22PBB – NHTSA 22V630 Page 1 of 4 22PBH – Stability Control in Regenerative Braking Author: Darrell Cook 9/20/2022 Title (metadata) 22PBH – Stability Control in Regenerative Braking – NHTSA ID: 22V630 Bulletin No. 22PBB – NHTSA 22V630 Description 22PBH – Stability Control in Regenerative Braking Supplier Dana Section Electric Propulsion System – 46 What’s New Abstract Safety Recall – The electric powertrain control unit may not respond to a stability control command while the truck is in a regenerative braking mode during a stability control event. The operator could be unaware of any issue with the vehicle, increasing the risk of a crash. Repair information will be added when a repair procedure and parts are available. Revision Introduction On certain vehicles equipped with a battery electric powertrain and stability control, the electric powertrain control unit may not respond to a stability control command while the truck is in a regenerative braking mode during a stability control event, increasing the risk of a crash. Situation (Chassis Affected) PB – 2 (2 US / 0 Canada) 220 chassis model year 2021 vehicles built from 03/05/2021 through 05/08/2021 with a battery electric powertrain and stability control. Resolution Safety Recall This bulletin will be updated when the repair procedure and parts are available. (INTERIM BULLETIN ENDS HERE) 22PBH – Stability Control in Regenerative Braking 22PBB – NHTSA 22V630 Page 2 of 4 Warranty KENWORTH WARRANTY STATEMENT Add boiler plate text from appropriate warranty section in the Authoring Templates in Onenote. Through Standard Warranty (excludes Extended Warranty) or for repairs completed by MM/DD/YYYY, whichever is greater, Kenworth will pay for parts at dealer net plus applicable mark-up and labor: Warranty Parts PETERBILT WARRANTY STATEMENT Add boiler plate text from appropriate warranty section in the Authoring Templates in Onenote. Through Standard Warranty (excludes Extended Warranty) or for repairs completed by MM/DD/YYYY, whichever is greater, Peterbilt will pay for parts at dealer net plus applicable mark-up and labor: Warranty Parts Background Question for warranty approver: Has Take-Off Parts Disposition been confirmed? Does the supplier warranty matrix match the bulletin? Take-Off Parts Disposition: Destroy take-off parts 30 days after claim is paid Ship take-off parts to supplier per ship code N/A PRWS CLAIM CODING Campaign Code: Only required for Campaigns Campaign Type Choose an item. Claim Category: Choose an item. Repair Type Choose an item. Customer Concern Code See Customer Concern Code chart Causal Code See Causal Codes chart Corrective Action Code See Corrective Action Code chart Responsibility Code: Choose an item. Failure Location XXX-XXX-XXX Causal Part Must be searchable in Parts Hub 22PBH – Stability Control in Regenerative Braking 22PBB – NHTSA 22V630 Page 3 of 4 Supplier Code Only required if Responsibility Code is CampSupp SRT Code See SRT table or consult with SRT team Display in SIR Never Visible Editable by dealer? Yes KW AutoPay Choose an item. PB AutoPay Choose an item. Table 1 KW DWC Table DWC CLAIM CODING Failure Location: xxx-xxx-xxx Work Accomplished: Failure Type: xxx Responsibility Code: SRT Code: xxx-xxx Claim Type: Vendor Code: Only required if not a 01 Responsibility Code Campaign Field: Only required for Campaigns Table 2 PB DWC Table DWC CLAIM CODING Failure Location: xxx-xxx-xxx Work Accomplished: Failure Type: xxx Responsibility Code: xx SRT Code: xxx-xxx Claim Type: X Vendor Code: Only required if not a 01 Responsibility Code Campaign Field: Only required for Campaigns 22PBH – Stability Control in Regenerative Braking 22PBB – NHTSA 22V630 Page 4 of 4 Parts are available from PACCAR Parts. Quantity Part Number Description Procedure Please follow your dealership’s safety procedures and precautions to ensure the vehicle can be safely repaired and maintained. See Procedures for more info. If this is a long procedure, then it may be better to create an attachment. Use the PACCAR Procedure Template. Links Dealer\Chassis List Customer Letter Channels KWUS ☐ KWCA☐ KWGS☐ PBUS☐ PBCA☐ Same bulletin published to KW & PB regions? Choose an item. Publish On Click or tap to enter a date.

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-630 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : PACCAR Incorporated Submission Date : NOV 17, 2022 NHTSA Recall No. : 22V-630 Manufacturer Recall No. : 22KWH, 22PBH Manufacturer Information : Manufacturer Name : PACCAR Incorporated Address : 777 106TH AVENUE NORTHEAST BELLEVUE WA 98004 Company phone : 940 591 4220 Population : Number of potentially involved : 4 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2022-2022 Kenworth K270 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : HYBRID ELECTRIC Descriptive Information : Trucks with battery electric powertrain and stability control. Production Dates : MAR 27, 2021 – AUG 07, 2021 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 2 : 2021-2021 Peterbilt 220 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : HYBRID ELECTRIC Descriptive Information : Trucks with battery electric powertrain and stability control. Production Dates : MAR 05, 2021 – MAY 08, 2021 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : Electric powertrain control unit may not respond to stability control commands while truck is in regenerative braking mode during a stability control event. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : Electric powertrain control unit not responding to a stability control command may increase the likelihood of a crash. Description of the Cause : Electric powertrain control unit software was not programmed correctly to accept some stability control commands. Part 573 Safety Recall Report 22V-630 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Identification of Any Warning that can Occur : No warning is available. Involved Components : Component Name 1 : Spec-Motor, Elec Vehicle Component Description : Electric powertrain components including control unit Component Part Number : D1-000000000000000 Supplier Identification : Component Manufacturer Name : Dana, Inc. Address : 3939 Technology Dr. Maumee Ohio 43537 Country : United States Chronology : 05-18-2022: Safety & Compliance notified issue was discovered on test truck going through testing un-related to the issue. No warranty claims or field reports of issue. 05-19-2022: Stability control supplier sent test report showing stability control commands not being carried out by electric powertrain control unit. 05-24-2022: Paccar engineering sent Safety & Compliance background information on issue. 05-26-2022: Paccar engineering sent additional background information. 06-14-2022: Safety & Compliance requested more information from Paccar engineering and stability control supplier. 06-23-2022: Requested information from supplier again. 07-11-2022: Requested information from supplier again. 07-13-2022: Stability control supplier approved powertrain control unit software change corrected issue. 07-28-2022: Requested Paccar engineering to aid in determining suspect population. Engineering communicated that planned release date for software update is 09/30. 08-10-2022: Suspect population defined. Software update moved up to 08/11. 08-11-2022: Joint Safety Committee determined a safety related defect exists. Part 573 Safety Recall Report 22V-630 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Remedy : Description of Remedy Program : Dealers will re-program electric powertrain control unit with software update free of charge. 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 : Software version for electric powertrain control unit. Identify How/When Recall Condition was Corrected in Production : Electric powertrain control unit software has been updated. Recall Schedule : Description of Recall Schedule : Notifications will be sent 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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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 22V-630 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-630 Manufacturer Recall No. : 22KWH, 22PBH Manufacturer Information : Manufacturer Name : PACCAR Incorporated Address : 777 106TH AVENUE NORTHEAST BELLEVUE WA 98004 Company phone : 940 591 4220 Population : Number of potentially involved : 4 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2022-2022 Kenworth K270 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : HYBRID ELECTRIC Descriptive Information : Trucks with battery electric powertrain and stability control. Production Dates : MAR 27, 2021 – AUG 07, 2021 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 2 : 2021-2021 Peterbilt 220 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : HYBRID ELECTRIC Descriptive Information : Trucks with battery electric powertrain and stability control. Production Dates : MAR 05, 2021 – MAY 08, 2021 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : Electric powertrain control unit may not respond to stability control commands while truck is in regenerative braking mode during a stability control event. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : Electric powertrain control unit not responding to a stability control command may increase the likelihood of a crash. Description of the Cause : Electric powertrain control unit software was not programmed correctly to accept some stability control commands. Part 573 Safety Recall Report 22V-630 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Identification of Any Warning that can Occur : No warning is available. Involved Components : Component Name 1 : Spec-Motor, Elec Vehicle Component Description : Electric powertrain components including control unit Component Part Number : D1-000000000000000 Supplier Identification : Component Manufacturer Name : Dana, Inc. Address : 3939 Technology Dr. Maumee Ohio 43537 Country : United States Chronology : 05-18-2022: Safety & Compliance notified issue was discovered on test truck going through testing un-related to the issue. No warranty claims or field reports of issue. 05-19-2022: Stability control supplier sent test report showing stability control commands not being carried out by electric powertrain control unit. 05-24-2022: Paccar engineering sent Safety & Compliance background information on issue. 05-26-2022: Paccar engineering sent additional background information. 06-14-2022: Safety & Compliance requested more information from Paccar engineering and stability control supplier. 06-23-2022: Requested information from supplier again. 07-11-2022: Requested information from supplier again. 07-13-2022: Stability control supplier approved powertrain control unit software change corrected issue. 07-28-2022: Requested Paccar engineering to aid in determining suspect population. Engineering communicated that planned release date for software update is 09/30. 08-10-2022: Suspect population defined. Software update moved up to 08/11. 08-11-2022: Joint Safety Committee determined a safety related defect exists. Part 573 Safety Recall Report 22V-630 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Remedy : Description of Remedy Program : Dealers will re-program electric powertrain control unit with software update free of charge. 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 : Software version for electric powertrain control unit. Identify How/When Recall Condition was Corrected in Production : Electric powertrain control unit software has been updated. Recall Schedule : Description of Recall Schedule : Notifications will be sent 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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