{"nhtsa_id":10054844,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2014-03-05","date":"2014-01-01","document_id":"PI-0840","mfr_campaign":null,"replaces":null,"component":"ENGINE","mfr_system":null,"summary":"MACK: SOME VEHICLES REQUIRE SOFTWARE UPDATES FOR THE ENGINE CONTROL MODULE (ECM). THE UPDATES CONCERN THE PISTON COOLING JET (PCJ) DIAGNOSTIC FAULT LOGIC AND REGENERATION IN COLD CLIMATES. MODELS INCLUDE OBD2013, MP7, MP8, MP10,CHU, CXU, GU, LEU, MRU, TD. NO MODEL YEARS PROVIDED. *JS","document":null,"url":"https://open.wenmarpro.com/bulletins/10054844","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"MACK","model":"MACK","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":[]}