{"nhtsa_id":10188806,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-03-15","date":"2021-02-05","document_id":"18-012-21","mfr_campaign":null,"replaces":null,"component":"FUEL SYSTEM, DIESEL; SERVICE BRAKES, HYDRAULIC; EXTERIOR LIGHTING; ELECTRICAL SYSTEM; FUEL SYSTEM, GASOLINE","mfr_system":null,"summary":"Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the Engine Control Module/Powertrain Control Module (ECM/PCM) with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that one or more of the following Diagnostic Trouble Codes (DTCs) have been set. The customer may also notice one or more of the following:Harsh downshift clunk during exhaust brake decel","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10188806-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10188806-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10188806","components":[{"id":"brakes","name":"Brakes","parent":null},{"id":"electrical","name":"Electrical system","parent":null},{"id":"fuel-system","name":"Fuel system","parent":null},{"id":"lighting","name":"Lighting","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"RAM","model":"2500","year_from":2020,"year_to":2020,"match":"exact","vehicle_ids":["2020_ram_2500"]},{"make":"RAM","model":"3500","year_from":2020,"year_to":2020,"match":"exact","vehicle_ids":["2020_ram_3500"]}],"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":[]}