{"nhtsa_id":11028314,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-02-05","date":"2026-01-31","document_id":"45-070","mfr_campaign":"45-070","replaces":null,"component":"ENGINE","mfr_system":null,"summary":"Procedure pictures updated for clarity. 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.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11028314-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11028314-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11028314","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"KENWORTH","model":"C500","year_from":2017,"year_to":2025,"match":null,"vehicle_ids":[]},{"make":"KENWORTH","model":"C500 EXP","year_from":2025,"year_to":2025,"match":null,"vehicle_ids":[]},{"make":"KENWORTH","model":"C500B","year_from":2024,"year_to":2025,"match":null,"vehicle_ids":[]},{"make":"KENWORTH","model":"T680","year_from":2017,"year_to":2026,"match":"exact","vehicle_ids":["2017_kenworth_t680","2018_kenworth_t680","2019_kenworth_t680","2020_kenworth_t680","2021_kenworth_t680","2022_kenworth_t680","2023_kenworth_t680","2024_kenworth_t680","2025_kenworth_t680","2026_kenworth_t680"]},{"make":"KENWORTH","model":"T800","year_from":2017,"year_to":2025,"match":null,"vehicle_ids":[]},{"make":"KENWORTH","model":"T800B","year_from":2021,"year_to":2025,"match":null,"vehicle_ids":[]},{"make":"KENWORTH","model":"T880","year_from":2017,"year_to":2026,"match":"exact","vehicle_ids":["2017_kenworth_t880","2018_kenworth_t880","2019_kenworth_t880","2020_kenworth_t880","2021_kenworth_t880","2022_kenworth_t880","2023_kenworth_t880","2024_kenworth_t880","2025_kenworth_t880","2026_kenworth_t880"]},{"make":"KENWORTH","model":"W900","year_from":2017,"year_to":2025,"match":null,"vehicle_ids":[]},{"make":"KENWORTH","model":"W900B","year_from":2021,"year_to":2025,"match":null,"vehicle_ids":[]},{"make":"PETERBILT","model":"365","year_from":2017,"year_to":2025,"match":"exact","vehicle_ids":["2017_peterbilt_365","2018_peterbilt_365","2019_peterbilt_365","2020_peterbilt_365","2021_peterbilt_365","2022_peterbilt_365","2023_peterbilt_365","2024_peterbilt_365","2025_peterbilt_365"]},{"make":"PETERBILT","model":"367","year_from":2017,"year_to":2025,"match":"exact","vehicle_ids":["2017_peterbilt_367","2018_peterbilt_367","2019_peterbilt_367","2020_peterbilt_367","2021_peterbilt_367","2022_peterbilt_367","2023_peterbilt_367","2024_peterbilt_367","2025_peterbilt_367"]},{"make":"PETERBILT","model":"389","year_from":2017,"year_to":2025,"match":"exact","vehicle_ids":["2017_peterbilt_389","2018_peterbilt_389","2019_peterbilt_389","2020_peterbilt_389","2021_peterbilt_389","2022_peterbilt_389","2023_peterbilt_389","2024_peterbilt_389","2025_peterbilt_389"]},{"make":"PETERBILT","model":"567","year_from":2017,"year_to":2026,"match":"exact","vehicle_ids":["2017_peterbilt_567","2018_peterbilt_567","2019_peterbilt_567","2020_peterbilt_567","2021_peterbilt_567","2022_peterbilt_567","2023_peterbilt_567","2024_peterbilt_567","2025_peterbilt_567","2026_peterbilt_567"]},{"make":"PETERBILT","model":"579","year_from":2017,"year_to":2026,"match":"exact","vehicle_ids":["2017_peterbilt_579","2018_peterbilt_579","2019_peterbilt_579","2020_peterbilt_579","2021_peterbilt_579","2022_peterbilt_579","2023_peterbilt_579","2024_peterbilt_579","2025_peterbilt_579","2026_peterbilt_579"]},{"make":"PETERBILT","model":"589","year_from":2024,"year_to":2026,"match":"exact","vehicle_ids":["2024_peterbilt_589","2025_peterbilt_589","2026_peterbilt_589"]}],"as_of":"2026-10-19","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}