{"nhtsa_id":10188827,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-03-15","date":"2021-02-27","document_id":"21-009-21","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN","mfr_system":null,"summary":"Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes (DTCs) have been set:P1DDE-00 - Ignition Run-Start Input 1-2 Correlation. P1DF3-00 - ECU Not Initialized. P07E4-00 - Unable To Engage Park. P0735-00 - Gear 5 Shift Incorrect Ratio. The customer may also notice the following condition: Drivetrain \"clunks\" or harsh/rough upshifts, specifically going into 2nd, 3rd or 4th gears. The following enhancements are also included in this software update:Improvement to the 5-3-2 downshift to preventDTC P0735-00. Shifter auto-position correction with ignition in the ?Run/Acc? positions during an AutoPark event.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10188827-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10188827-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10188827","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":["P0735","P07E4","P1DDE","P1DF3"],"topics":[],"vehicles":[{"make":"RAM","model":"1500","year_from":2019,"year_to":2019,"match":"exact","vehicle_ids":["2019_ram_1500"]}],"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":[]}