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Service bulletin 131-25020

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id11026523
Published by NHTSA2025-12-10
Manufacturer's number131-25020
Manufacturer's date2025-11-03
Campaign id or software version131-25020
NHTSA componentENGINE
Manufacturer's systemECM: Software

NHTSA's summary

Updating the ECM (Engine Control Module), to the latest level software. REASON - A new ECM SW update is available on EmiraDS to resolve the following issues: - The false setting of U010900 DTC (Diagnostic Trouble Code). - Reduce the delay time between pressing the start button and engine cranking for vehicles with lower tolerance fuel pump pressure. ACTION - Check and identify any affected Emira vehicles from your inventory stock, dealer demonstrators and customer vehicles to ensure that this campaign action is performed at the first opportunity. - Any affected vehicle’s campaign status will be displayed on the Lotus Commercial Management System (LCMS). NOTE: This SW update will not affect current vehicle functionality

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine

Trouble codes named

U0109

Vehicles listed
LOTUS EMIRA2024, 2025

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
131-26007 Issue 32026-10-07. Service bulletin. 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.
131-260092026-04-13. Service bulletin. Availability of ASO exhaust muffler (rear silencer) valve actuator as service replacement part. Until recently the failure of the exhaust muffler valve actuator has required the exhaust muffler and valve to be renewed as a complete assembly. The exhaust muffler valve actuator is now available as a separate replacement part. The advantages of not having to replace the combined assembly are for a faulty actuator are: - Less labour-intensive procedure to replace. - More practical to keep an exhaust muffler valve actuator as a parts stock item. If an exhaust muffler valve actuator is diagnosed as faulty then please determine if the exhaust flow valve mechanism in the rear silencer is operating and moving correctly*, if it is then please fit a new valve actuator instead of a complete muffler assembly. *Actuator replacement is only suitable if the exhaust flow valve mechanism in the rear silencer is operating and moving correctly. If the exhaust flow valve is not operating or seized, then the exhaust silencer or actuator assembly should be replaced.
131-260072026-04-13. Service bulletin. 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. 1. If the thermostat MOVES FREELY when heated and cooled, then refit the original thermostat with a new gasket and refill the engine with new antifreeze/coolant. 2. If the thermostat DOES NOT move freely when heated and cooled, then fit a NEW thermostat and gasket and refill the engine with new antifreeze/coolant. Carefully package the thermostat and contact Emira Support using LCMS to arrange collection.
TSB-131-240032024-03-20. Service bulletin. Installation of the latest ECM software for Emira vehicles in the Federal market to ensure that they meet the current CARB compliance requirements. Check and identify any affected Emira vehicles from inventory stock, dealer demonstrators to ensure that this campaign action is performed at the first opportunity. Install the new software part number V6 J1U4 as stated on Service Bulletin 131-24003