{"nhtsa_id":10055180,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2014-04-19","date":"2014-02-01","document_id":"PI-0839","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM:SOFTWARE","mfr_system":null,"summary":"MACK TRUCK: TO ADDRESS PISTON COOLING JET (PCJ) DIAGNOSTIC FAULT, REGENERATIONS IN COLD CLIMATES (-20C), THE TRANSMISSION ELECTRONIC CONTROL UNIT (TECU), ENGINE CONTROL MODULE (ECM) AND AFTERTREATMENT CONTROL MODULE (ACM) HAVE UPDATED SOFTWARE ENHANCEMENT THAT ARE AVAILABLE. MODEL CHU, CXU. *PE","document":null,"url":"https://open.wenmarpro.com/bulletins/10055180","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"software","name":"Software","parent":"electrical"}],"codes":[],"topics":[],"vehicles":[{"make":"MACK","model":"CHU","year_from":2010,"year_to":2010,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"CXU","year_from":2010,"year_to":2010,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"PINNACLE (CHU)","year_from":2011,"year_to":2012,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"PINNACLE (CXU)","year_from":2011,"year_to":2012,"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":[]}