{"nhtsa_id":10237775,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2023-06-13","date":"2023-05-11","document_id":"FSB.0022","mfr_campaign":null,"replaces":null,"component":"FUEL SYSTEM, GASOLINE; ELECTRICAL SYSTEM:SOFTWARE; ELECTRICAL SYSTEM","mfr_system":null,"summary":"This document is the procedure for when an OEM fuel gauge displays inconsistent fuel levels or no data on certain Peterbilt chassis models 520, 567, and 579 equipped with Hexagon Agility compressed natural gas (CNG) fuel systems with Blue iQ and PACCAR dash clusters built after July 2021. This document added instruction to update fuel system control module (FSCM) to latest software revision before performing any diagnostics.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10237775-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10237775-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10237775","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"fuel-system","name":"Fuel system","parent":null},{"id":"software","name":"Software","parent":"electrical"}],"codes":[],"topics":[],"vehicles":[{"make":"AGILITY FUEL SYSTEMS","model":"BLUE IQ","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"PETERBILT","model":"ENGINE & ENGINE COOLING","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]}],"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":[]}