{"nhtsa_id":10241084,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2023-08-21","date":"2023-06-14","document_id":"0901023","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"Make Up Air (MUA) Valve Leak Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that the following Diagnostic Trouble Code (DTC) has been set: ? P2C90 - Crankcase Ventilation System - Hose A Disconnected. This bulletin involves replacing the MUA check valve, or performing an inspection and possibly replacing the PCV valve.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10241084-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10241084-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10241084","components":[{"id":"engine","name":"Engine","parent":null}],"codes":["P2C90"],"topics":[],"vehicles":[{"make":"JEEP","model":"GRAND WAGONEER","year_from":2023,"year_to":2023,"match":"exact","vehicle_ids":["2023_jeep_grand-wagoneer"]},{"make":"JEEP","model":"WAGONEER","year_from":2023,"year_to":2023,"match":"exact","vehicle_ids":["2023_jeep_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":[]}