{"vehicle":{"id":"2022_chevrolet_5500hd","year":2022,"make":"Chevrolet","model":"5500HD"},"code":"P2201","generic":true,"description":null,"bulletins":{"as_of":"2026-10-19","count":1,"bulletins":[{"nhtsa_id":11006063,"type":"service_campaign","type_name":"Service campaign","date_added":"2024-08-07","date":"2024-08-07","document_id":"N242469060","mfr_campaign":"N242469060","component":"UNKNOWN OR OTHER","summary":"Certain vehicles may erroneously experience an illuminated Check Engine Malfunction Indicator Lamp (MIL) with Diagnostic Trouble Codes (DTC) P2201 NOx Sensor Circuit Performance Sensor 1 and/or P20EE Diesel Exhaust Fluid (DEF) System NOx Trap Low Efficiency. Dealers will reprogram the ECM and/or the DCU with the corrected service calibrations.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11006063-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11006063-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11006063"}],"url":"https://open.wenmarpro.com/makes/chevrolet/5500hd/2022/bulletins?code=P2201"},"related":{"components":[],"bulletins":[],"recalls":{"may_apply":true,"recalls":[],"lookup":{"nhtsa":"https://www.nhtsa.gov/recalls","tc":"https://wwwapps.tc.gc.ca/Saf-Sec-Sur/7/VRDB-BDRV/search-recherche/menu.aspx?lang=eng","maker":null}}},"url":"https://open.wenmarpro.com/makes/chevrolet/5500hd/2022/codes/P2201","note":"The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.","attribution":["Contains information licensed under the Open Government Licence – Canada."]}