{"nhtsa_id":10076539,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2016-07-14","date":"2016-04-22","document_id":"21-017-16","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN:AUTOMATIC TRANSMISSION","mfr_system":null,"summary":"SYMPTOM/CONDITION: Some customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation, a technician may find the following Diagnostic Trouble Code (DTC) stored in the TCM memory: • P0731 - Gear Ratio Error In 1st. The following enhancements are included in the software update: • Improved general shift quality. • Improved 7th gear upshift timing. • Downhill engine braking improvements.","document":null,"url":"https://open.wenmarpro.com/bulletins/10076539","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"powertrain","name":"Transmission and driveline","parent":null},{"id":"automatic-transmission","name":"Automatic transmission","parent":"powertrain"},{"id":"software","name":"Software","parent":"electrical"}],"codes":["P0731"],"topics":[],"vehicles":[{"make":"RAM","model":"1500","year_from":2016,"year_to":2016,"match":"exact","vehicle_ids":["2016_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":[]}