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Service bulletin NTB18-044

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 id10143136
Published by NHTSA2018-07-23
Manufacturer's numberNTB18-044
Manufacturer's date2018-06-19
NHTSA componentELECTRICAL SYSTEM:SOFTWARE; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL

NHTSA's summary

VOLUNTARY EMISSIONS SERVICE CAMPAIGN 2018 SENTRA SR AND NISMO; ECM REPROGRAMMING This bulletin applies only to vehicles equipped with SR or Nismo trim level packages. INTRODUCTION Nissan is conducting this voluntary emissions service campaign on certain specific model year 2018 Sentra Turbo SR and Sentra NISMO vehicles. The Engine Control Module (ECM) will be reprogrammed so that in the event of an engine coolant bypass (Multiway coolant flow Control Valve or MCV) diagnostic issue that properly illuminates a Malfunction Indicator Light (MIL), the software can also accurately determine when the issue has been corrected. This service will be performed at no charge to the customer for parts or labor. IDENTIFICATION NUMBER Nissan has assigned identification number R1805 to this campaign. This number must appear on all communication and documentation of any nature dealing with this campaign. DEALER RESPONSIBILITY Dealers are to repair vehicles falling within range of this campaign that enter the service department. This includes vehicles purchased from private parties, vehicles presented by transient (tourists) owners, and vehicles in a dealer?s inventory.

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

Electrical system, Engine, Exhaust and emissions, Software

Vehicles listed
NISSAN SENTRA2018

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
NTB15-049r2019-02-19. Service bulletin. TELEMATICS SERVICE INFORMATION This bulletin applies only to vehicles equipped with a Telematics Communication Unit (TCU). This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
NTB18-031b2018-09-17. Service bulletin. 2016-2018 NISSAN CONNECT NAVIGATION SYSTEM SOFTWARE UPDATE TO RESOLVE SEVERAL ISSUES This bulletin has been amended. The IF YOU CONFIRM section and software number has changed. No other changes have been made. Please discard previous versions of this bulletin.
R18052018-07-23. Service bulletin. ECM Reprogram Voluntary Emissions Service Campaign This bulletin applies only to vehicles equipped with SR or Nismo trim level packages. ***** Campaign Summary***** Nissan has reclassified the previously announced quality action (P8307) for new vehicle inventory as a Voluntary Emissions Service Campaign to update the Engine Control Module (ECM) software to prevent permanent storage of a DTC as a result of a Multiway Control Valve (MCV) malfunction on 853 specific 2018 Nissan Sentra (B17) SR and NISMO vehicles equipped with the MR16DDT engine. If a MCV malfunction occurred and was repaired, the current ECM logic will allow a technician to reset the Malfunction Indicator Lamp (MIL), but the DTC will remain stored in ECM memory. Resulting in Inspection/Maintenance (I/M; a.k.a. smog test) failure when a DTC check is performed at an inspection station. ***** What Dealers Should Do ***** 1. Verify if vehicles are affected by this Voluntary Service Campaign using Service Comm or DBS National Service History ? Open Campaigns I.D. R1805. 2. Dealers are requested to repair any affected vehicles in dealer new or pre-owned inventory to ensure customer satisfaction. - New vehicles in dealer inventory can also be identified using DBS (Sales-> Vehicle Inventory, and filter by Open Campaign). - Refer to NPSB 15-460 for additional information 3. Dealers should use NTB18-044 to correct any vehicles subject to this campaign. 4. Once repaired, dealers should submit the claim, using the claims coding provided, and release the vehicle.
NTB18-031a2018-06-18. Service bulletin. 2016-2018 NISSAN CONNECT NAVIGATION SYSTEM SOFTWARE UPDATE TO RESOLVE SEVERAL ISSUES This bulletin applies only to vehicles equipped with navigation system. This bulletin has been amended to correct Bosch contact information on page 2. No other changes have been made. Please discard previous versions of this bulletin.