{"nhtsa_id":11030940,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-04-07","date":"2026-03-28","document_id":"TSB260046","mfr_campaign":null,"replaces":null,"component":"ENGINE","mfr_system":null,"summary":"This Technical Service Bulletin describes the verification and instruction steps for certain X15 engines installed in PACCAR chassis which may experience elevated crankcase pressure, resulting in fault codes 555 (Crankcase Pressure - Data Valid But Above Normal Operating Range - Moderately Severe Level) or 556 (Crankcase Pressure - Data Valid But Above Normal Operating Range - Most Severe Level) being set.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11030940-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11030940-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11030940","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CUMMINS","model":"X15","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]}],"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":[]}