{"nhtsa_id":10227772,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-12-13","date":"2022-12-13","document_id":"A222379710","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"Service Update. In certain vehicles, if the Engine Control Module (ECM) sets the DTC P0521 (Engine Oil Pressure Sensor Performance), the ECM cannot clear the permanent status of this DTC. If the ECM had previously set a DTC P0521 and the permanent status is not properly cleared, the vehicle may not pass certain Emissions Inspection/Maintenance (I/M) tests. Dealers are to reprogram the ECM.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10227772-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10227772-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10227772","components":[{"id":"engine","name":"Engine","parent":null}],"codes":["P0521"],"topics":[],"vehicles":[{"make":"BUICK","model":"ENCORE GX","year_from":2020,"year_to":2023,"match":"exact","vehicle_ids":["2020_buick_encore-gx","2021_buick_encore-gx","2022_buick_encore-gx","2023_buick_encore-gx"]},{"make":"CHEVROLET","model":"TRAILBLAZER","year_from":2021,"year_to":2023,"match":"exact","vehicle_ids":["2021_chevrolet_trailblazer","2022_chevrolet_trailblazer","2023_chevrolet_trailblazer"]}],"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":[]}