{"nhtsa_id":10159955,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2019-05-20","date":"2015-11-21","document_id":"18-090-15","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"P20EE SCR NOX Catalyst Efficiency Below Threshold Bank 1 This bulletin involves verifying the proper operation of the Diesel Exhaust Fluid (DEF) system and, if necessary, replacing the Selective Catalyst Reduction (SCR) Catalyst assembly. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the Technician may find Diagnostic Trouble Code (DTC) P20EE SCR NOX Catalyst Efficiency Below Threshold Bank 1 set in the Powertrain Control Module (PCM) memory.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2015/MC-10159955-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2015/MC-10159955-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10159955","components":[{"id":"engine","name":"Engine","parent":null}],"codes":["P20EE"],"topics":[],"vehicles":[{"make":"DODGE","model":"RAM 3500","year_from":2011,"year_to":2012,"match":"base","vehicle_ids":["2011_dodge_ram","2012_dodge_ram"]},{"make":"DODGE","model":"RAM 4500","year_from":2011,"year_to":2012,"match":"base","vehicle_ids":["2011_dodge_ram","2012_dodge_ram"]},{"make":"DODGE","model":"RAM 5500","year_from":2011,"year_to":2012,"match":"base","vehicle_ids":["2011_dodge_ram","2012_dodge_ram"]}],"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":[]}