R22BZ-SB – ECM Short Circuit May Cause Engine Stall – 2023 Blue Bird All American School Buses

August 8, 2022 NHTSA CAMPAIGN NUMBER: 22V600000

ECM Short Circuit May Cause Engine Stall

An unexpected engine shut down can increase the risk of a crash. Additionally, a disabled school bus may require an evacuation procedure in an uncontrolled traffic situation, increasing the risk of injury to passengers.

 

NHTSA Campaign Number: 22V600

Manufacturer Blue Bird Body Company

Components ENGINE AND ENGINE COOLING

Potential Number of Units Affected 2

 

Summary

Blue Bird Body Company (Blue Bird) is recalling certain 2023 All American school buses. The engine control module (ECM) may experience an internal short-circuit, which can result in an unexpected engine shut down without the ability to restart the vehicle.

 

Remedy

The remedy is currently under development. Owner notification letters are expected to be mailed on September 26, 2022. Owners may contact Blue Bird’s customer service at 1-478-822-2242. Blue Bird’s number for this recall is R22BZ-SB.

 

Notes

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.

 


Blue Bird
Blue Bird

 


Chronology :

June 14, 2022: Cummins received a report from an OEM of an ECM failure at an OEM facility.

June 21, 2022: Cummins notified the ECM supplier, Vitesco, of the failure.

June 21-29, 2022: Cummins received additional reports from OEMs of ECM failures occurring during production. Cummins collected and returned three ECM’s to the supplier for failure analysis.

June 28-20, 2022: Vitesco informed Cummins about the Potential Circuit Board (PCB) damage after confirming that ECM’s returned from Cummins were due to this failure mode. According to the supplier, ECM’s with potentially damaged PCB’s were produced May 16, 2022 through June 2, 2022.

Cummins initiated containment actions at impacted engine plants and vehicle OEM plants.

June 30, 2022: Cummins and Vitesco began investigating the failure mechanisms and potential screening test methods.

June 14, 2022 through July 19, 2022: Cummins received two field reports alleging on-road engine stalls.

July 11-12, 2022: Cummins conducted a Product Safety Hazard Analysis.

July 12-19, 2022: Cummins escalated the issue through its Product Safety Defect Determination process, including gathering additional information and conducting additional analysis for the Product Safety Hazard Analysis.

July 21, 2022: Based upon the results of the investigation, the Cummins Product Safety Defect Board decided this issue constitutes a safety defect. Accordingly, Cummins will notify OEM customers of this defect. For those OEM’s that make a safety defect determination with respect to their potentially affected vehicle population, Cummins will, at the OEM’s request, conduct the notification and remedy campaign on their behalf. To date, there have been no reports of accidents or injuries due to this condition.

Note regarding production start dates: For reasons unrelated to this issue, some engines were built without ECM’s prior to May 16, 2022, and later upfit with suspect ECMs.

August 3, 3022: Blue Bird was notified by Cummins.

 


22E063 – C2614 – Electrical Short Circuit May Cause Engine Stall – Cummins

 

22E063 – C2614 – Electrical Short Circuit May Cause Engine Stall – Cummins

 


1 Affected Product

Vehicle

MAKE MODEL YEAR
BLUE BIRD ALL AMERICAN 2023

 


4 Associated Documents

Defect Notice 573 Report

RCLRPT-22V600-6848.PDF 214.898KB

RCLRPT-22V600-6848

 


Recall Acknowledgement

RCAK-22V600-1944.pdf 646.012KB

RCAK-22V600-1944

 


Recall 573 Report-08/10/2022

RCLRPT-22V600-1544.PDF 214.93KB

RCLRPT-22V600-1544

 


Recall 573 Report- 08/12/2022

RCLRPT-22V600-3965.PDF 215.436KB

RCLRPT-22V600-3965

 


Latest Recalls Documents

https://www-odi.nhtsa.dot.gov/acms/cs/documentList.xhtml?docId=22V600&docType=RCL

 


 

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Last update on 2022-09-29 / Affiliate links / Images from Amazon Product Advertising API

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