{"nhtsa_id":11026687,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2025-12-17","date":"2025-12-13","document_id":"18-109-25","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM; ENGINE","mfr_system":null,"summary":"Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician must find one or more of the following Diagnostic Trouble Codes (DTC)s have been set: ● P2450 - Fuel Tank Isolation Valve Stuck Open. ● P1D83 - Implausible Engine Oil Temperature Signal Received. Customers may comment on one or more of the following: ● Fuel Door will not open due to intermittent Fuel Tank Isolation Valve (FTIV) Stuck Open. ● Reduced fuel efficiency. In addition, the following software enhancement is available: ● Hood Switch changes. This bulletin involves reprogramming the PCM, HCP and AHCP, also known as the Power Inverter Module (PIM) with the latest available software","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11026687-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11026687-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11026687","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"engine","name":"Engine","parent":null}],"codes":["P1D83","P2450"],"topics":[],"vehicles":[{"make":"JEEP","model":"WRANGLER 4XE","year_from":2021,"year_to":2021,"match":"base","vehicle_ids":["2021_jeep_wrangler"]}],"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":[]}