Service bulletin 131-26021

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)
Type	Service bulletin
NHTSA id	11038274
Published by NHTSA	2026-10-07
Manufacturer's number	131-26021
Manufacturer's date	2026-09-14
Campaign id or software version	131-26021
NHTSA component	POWER TRAIN
Manufacturer's system	CPC and TCU: Software for CPC and TCU

NHTSA's summary

Installation of the latest combined CPC (Controller Central Powertrain) and TCU (Transmission Control Unit) software for Emira 4-cylinder vehicles. REASON For continued customer satisfaction, software upgrades have been made available for aftersales service on EmiraDS, improving the vehicle driveability of 2024/2025 model year 4-cylinder vehicles to the same standard as 2026 model year vehicles. 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 in the warranty section of LCMS. - Ensure that the vehicle owner has been made aware of the updates to vehicle functionality. Important: Please make the owner aware, that once these updates are installed, it cannot be reversed to the previous software versions.

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

Transmission and driveline

Vehicles listed
LOTUS EMIRA	2024, 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
131-25019	2025-12-11. Service bulletin. Updating the TCM (Transmission Control Module) to the latest level software. REASON - A new TCM SW update is available on EmiraDS to resolve the following issues: - Fix to shift solenoid diagnostics failing to detect faults during shifts. - Fix to reported gear to ECM once in mechanical limp home or forced gear neutral to prevent lockout of PRND shifts if solenoid fails in transition between gears. - Fix to displayed gear in edge case (more then one failure at the same time) leading to stuck in reverse while trying to achieve force neutral fault reaction. ACTION - This is a market service activity to proactively schedule customers to come back to the dealership for this latest level software update as described in this technical service bulletin. - 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).
131-25015	2025-08-05. Service bulletin. New VBF headers and Bootloader SW available for the TCU (Transmission Control Unit). The new VBF headers and Bootloader software will allow for future SW updates of the TCU using EmiraDS. 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: Please inform the vehicle owner that this TCU bootloader SW update will not affect current vehicle functionality. Procedure Using the Lotus Insight tool, the Emira Diagnostic System will show the availability of a new software version for the TCU. Note: This MUST be done using the Lotus Insight Tool.
TSB 131-25003	2025-04-07. Service bulletin. Generation of P0507 DTC (Diagnostic Trouble Code) when selecting ‘Sport’ or ‘Track’ mode. For Emira 4-cylinder 2024/2025 model year vehicles, a fault within the EMS (Engine Management System) software can cause the unnecessary generation of DTC P0507 if ‘Sport’ or ‘Track’ mode are selected in the sequence as shown below. With the vehicle stationary and engine running, the specific steps to recreate the fault are: - The engine speed has previously exceeded 4200 rpm in the same drive cycle that you wish to select ‘Sport’ or ‘Track’. - Depressing the brake pedal when either ‘Sport’ or ‘Track’ mode is selected. - Then activating the parking brake with the brake pedal still depressed and then selecting D - Drive. - Then releasing the brake pedal with the parking brake still activated. - This will cause the engine speed will rise to 1100 rpm and approximately after 4 seconds, will result in DTC P0507 being generated. Note: This fault within the EMS software affects all market vehicles but will not be noticed except for Chinese and Federal markets, because for those markets, it will result in the MIL (Malfunction Indicator Lamp) being permanently illuminated until the fault code is cleared using EmiraDS. ACTION For Chinese and Federal Market Vehicles If you are presented with a 4-cylinder Emira where the MIL has been illuminated because of DTC P0507 generation: - Please confirm with the vehicle owner if the MIL became illuminated after selecting ‘Sport or ‘Track’ mode? If the owner is unsure, and you have checked and eliminated all other faults associated with DTC P0507 (engine idle speed higher than expected), such as an air intake leak or throttle sticking etc, then: - Clear the code and ask the owner to monitor the situation. Explain to the owner that if they wish to select ‘Sport’ or ‘Track’ mode, then ensure: - That they do not allow the car to remain stationary in D - Drive with only the parking brake activated (i.e. brake pedal should be depressed or either N - Neutral or P - Park selected). - Then, with the brake pedal still depressed and the parking brake still active, select D- Drive. - Then with the brake pedal still depressed, manually release/deactivate the parking brake Or; - Release the brake pedal and the parking brake will automatically release/deactivate. - Allow the vehicle to move forwards or depress the throttle to achieve the desired acceleration.
TSB-131-24030	2024-11-04. Service bulletin. Inspection of transmission driveshaft fitment/security if specific faults are reported. Lotus has received reports from the dealer network of: ̵ Loss of drive. ̵ Oil leaking from the transmission driveshaft seals. ̵ Transmission noise while driving. It has been identified that a potential cause of these issues is as a result of the driveshafts not being fully locked in position into the transmission at the time of vehicle assembly. Start of production for both Emira V6 powertrain (manual and automatic) and Emira 4-cylinder DCT up to 2025 model year VIN SCCLEKAX4RHB12094 inclusive. If an Emira owner contacts you, or you are presented with a vehicle within the affected VIN range which has any of the transmission faults listed above, then the following transmission components must be checked for damage caused by incorrect installation: ̵ Driveshaft splines. ̵ Driveshaft circlips. ̵ Driveshaft oil seal. Note: If the only fault is transmission fluid leakage from a driveshaft seal because the driveshaft is not fully locked into position and the vehicle is only at delivery mileage (less than 100 miles/160 km), then it is acceptable to push the driveshaft back into position if a visual inspection shows that the driveshaft seal has not been damaged, (and then check/top up the transmission oil level). Refer to the operation codes for driveshaft removal and re-fitment shown in sections 47.15. for both V6 and 4-cylinder powertrains from the Emira service notes which are available to view from the aftersales dealer portal at: https://dealerportal.uslotservice.lotuscars.com/log-in - from the Aftersales tab, select Service Manuals > Emira.
TSB-131-24024	2024-09-04. Service bulletin. Important information for a temporary recovery procedure for the Central Powertrain Controller (CPC Module). Updated software was recently released for the CPC module, but because of reported failures to complete the programming successfully when trying to upload the software, which had left some vehicles immobile* and CPC recovery cannot be achieved without performing a CPC RELOAD, therefore this update option has been temporarily disabled. *Because the CPC module in a partially programmed state cannot operate or communicate correctly with the vehicle networks. ACTION It is expected to re-enable this feature soon, but once enabled, if there is a failure to complete the programming successfully during an upgrade, please contact Emira Support (detailing on an LCMS ticket that this request requires LTIL Emira Support assistance).