{"nhtsa_id":11038270,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-10-07","date":"2026-09-30","document_id":"131-26007 Issue 3","mfr_campaign":"131-26007","replaces":null,"component":"ENGINE","mfr_system":"Medium Engine Coolant Thermostat","summary":"Emira 4-Cylinder vehicles only - Issue 3 includes updated information on thermostat the testing method and replaces version 2 of this bulletin published on 05.08.2026. Diagnosing medium temperature engine coolant thermostat operation to prevent unnecessary thermostat replacement. The information in this bulletin is intended as a procedure that should be performed if a 4-cylinder Emira has generated Diagnostic Trouble Code (DTC) P2CEF00 Auxiliary Thermostat “A” Stuck Open (see image for thermostat location). Generation of DTC P2CEF00 may also result in: - Illumination of the Malfunction Indicator Lamp (MIL). - A low coolant temperature warning message being displayed. IMPORTANT: Do not continue with the procedure in this bulletin If DTC P2CEF00 has NOT BEEN generated. ACTION If DTC P2CEF00 has been generated, then raise a technical ticket on LCMS (Lotus Cars Management System) and follow the procedure shown in TSB.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11038270-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11038270-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11038270","components":[{"id":"engine","name":"Engine","parent":null}],"codes":["P2CEF"],"topics":[],"vehicles":[{"make":"LOTUS","model":"EMIRA","year_from":2023,"year_to":2023,"match":null,"vehicle_ids":[]},{"make":"LOTUS","model":"EMIRA","year_from":2024,"year_to":2027,"match":"exact","vehicle_ids":["2024_lotus_emira","2025_lotus_emira","2026_lotus_emira","2027_lotus_emira"]}],"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":[]}