{"nhtsa_id":10249793,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2024-02-06","date":"2024-02-06","document_id":"N212350930","mfr_campaign":null,"replaces":null,"component":"FUEL SYSTEM, GASOLINE","mfr_system":null,"summary":"Service Update. Certain vehicles may incorrectly report to test tools an active permanent status of Transmission Control Module (TCM) Diagnostic Trouble Code (DTC) P2781 (Downshift Switch Circuit High). This could cause the vehicle to not pass an emissions inspection test in jurisdictions that check the permanent status of DTCs as part of an emissions testing program. Reprogram the TCM with updated software.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-10249793-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-10249793-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10249793","components":[{"id":"fuel-system","name":"Fuel system","parent":null}],"codes":["P2781"],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"CORVETTE","year_from":2021,"year_to":2021,"match":"exact","vehicle_ids":["2021_chevrolet_corvette"]}],"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":[]}