# 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.

- Type: Service bulletin
- NHTSA id: 11026523
- Published by NHTSA: 2025\-12\-10
- Manufacturer's number: 131\-25020
- Manufacturer's date: 2025\-11\-03
- Campaign id or software version: 131\-25020
- NHTSA component: ENGINE
- Manufacturer's system: ECM: 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

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11026523-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11026523-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine

## Trouble codes named

U0109

## Vehicles listed

- 2024 to 2025 LOTUS EMIRA

## Other bulletins for the same vehicles and component

- [131\-26007 Issue 3](/bulletins/11038270.md), 2026-10-07, Service bulletin: ENGINE. 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\-26009](/bulletins/11031269.md), 2026-04-13, Service bulletin: ENGINE. 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\-26007](/bulletins/11031268.md), 2026-04-13, Service bulletin: ENGINE. 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\-24003](/bulletins/10251944.md), 2024-03-20, Service bulletin: ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. 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

JSON: [/v1/bulletins/11026523](/v1/bulletins/11026523)

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