{"nhtsa_id":10245187,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2023-11-09","date":"2023-11-09","document_id":"N232427260","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING:ENGINE:DIESEL","mfr_system":null,"summary":"Customer Satisfaction Program - Certain vehicles may experience an illuminated Check Engine Malfunction Indicator Lamp (MIL) with Diagnostic Trouble Code (DTC) P2201 NOx Sensor Circuit Performance Sensor 1 and/or DTC P20EE Diesel Exhaust Fluid (DEF) System NOx Trap Low Efficiency set in the DEF Control Unit (DCU). Dealers will reprogram the diesel exhaust fluid control module with a corrected service calibration","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10245187-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10245187-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10245187","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"engine","name":"Engine","parent":null}],"codes":["P20EE","P2201"],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"6500HD","year_from":2021,"year_to":2021,"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":[]}