{"nhtsa_id":10159952,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2019-05-20","date":"2015-11-21","document_id":"18-091-15","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:ENGINE:DIESEL","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-10159952-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2015/MC-10159952-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10159952","components":[{"id":"engine","name":"Engine","parent":null}],"codes":["P20EE"],"topics":[],"vehicles":[{"make":"RAM","model":"3500","year_from":2013,"year_to":2014,"match":"exact","vehicle_ids":["2013_ram_3500","2014_ram_3500"]},{"make":"RAM","model":"4500","year_from":2013,"year_to":2014,"match":"exact","vehicle_ids":["2013_ram_4500","2014_ram_4500"]},{"make":"RAM","model":"5500","year_from":2013,"year_to":2014,"match":"exact","vehicle_ids":["2013_ram_5500","2014_ram_5500"]}],"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":[]}