{"nhtsa_id":10223159,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-10-17","date":"2022-03-04","document_id":"0804622","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM","mfr_system":null,"summary":"Flash: Amplifier (AMP) Diagnostic and System Updates This bulletin involves reprogramming the AMP with the latest available software. The customer may experience one or more of the following: Active Noise Cancellation (ANC) drone noise between 950 RPM and 1,000 RPM, during a start up. Battery draining. Blinking odometer. Upon further investigation the technician may find the following DTCs have been set:The AMP may set B221F-00 (Amplifier Internal) erroneously, it does not affect Active Noise Cancelation (ANC) performance.If B221F-00 is a stored fault update the AMP with appropriate software. If the fault is active, follow normal DTC diagnostics. Use inspection LOP (18-60-07-AF) to close the active RSU. B2204-00 - ECU Configuration Mismatch.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10223159-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10223159-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10223159","components":[{"id":"electrical","name":"Electrical system","parent":null}],"codes":["B2204","B221F"],"topics":[],"vehicles":[{"make":"JEEP","model":"GRAND WAGONEER","year_from":2022,"year_to":2022,"match":"exact","vehicle_ids":["2022_jeep_grand-wagoneer"]}],"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":[]}