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Service bulletins for the 2021 Nissan Sentra

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.

132 on file from NHTSA, as of 2026-10-19.

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Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
NTB25-0052025-01-30. Service bulletin. ENGINE. SERVICE INFORMATION If one of the APPLIED VEHICLES has DTC P2100 for “ETC MOT PWR-B1” or P2101 for “ETC FNCTN/CIRC-B1” stored in the Engine Control Module (ECM) with a customer complaint of loss of power, • Perform the revised Electronic Service Manual (ESM) procedure noted on page 2 for "PERFORM DTC CONFIRMATION PROCEDURE." HINT: This revised procedure will be added to the ESM in a future update.
NTB24-0452024-09-10. Service bulletin. ENGINE. ENGINE SUPPORT TOOLS APPLIED VEHICLES: 2020-2024 Sentra (B18) SERVICE INFORMATION A new Engine Support Bracket is now available to allow the CVT to be removed from the APPLIED VEHICLES without having to remove the engine. The procedure in this bulletin is different from the procedure currently in the ESM, which will be updated with this information at a later date. Please refer to the SERVICE PROCEDURE in this bulletin for information on how to use these new tools.
NTB22-045A2023-04-10. Service bulletin. SUSPENSION; STEERING; ENGINE AND ENGINE COOLING. RATTLE OR KNOCK NOISE FROM FRONT WHEN DRIVING OVER BUMPS AND/OR TURNING This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
NTB22-0962022-11-12. Service bulletin. ENGINE AND ENGINE COOLING. LOSS OF POWER, ENGINE NOISE, AND/OR BATTERY LIGHT ON IF YOU CONFIRM The customer describes one, or more, of the following: • Loss of power • Loud noise from the front of vehicle/engine area while running • The battery light is ON AND • It is confirmed that the noise is coming from the generator (alternator) ACTION Replace the Drive Belt Auto Tensioner, the Alternator, and the associated Drive Belt listed in the PARTS INFORMATION on the last page.
NTB22-067A2022-11-07. Service bulletin. ENGINE AND ENGINE COOLING. MIL ON WITH DTC P0401 AND/OR P0404 STORED IN THE ECM This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
NTB22-0452022-08-27. Service bulletin. ENGINE AND ENGINE COOLING. RATTLE OR KNOCK NOISE FROM FRONT WHEN DRIVING OVER BUMPS AND/OR TURNING IF YOU CONFIRM A rattle or knock noise is heard from the front of the vehicle when driving over bumps and/or turning. HINT: To aid in diagnosis, it is recommended that you view the video clip on ASIST before starting. To view the video clip, open the bulletin on ASIST and select “Video” at the bottom of the screen. To view the video full screen, right click the center of the video screen and select “Full Screen”. ACTION Follow the SERVICE PROCEDURE in this bulletin to verify the passenger (RH) side Engine Mounting Insulator is the source of the noise, and replace it with the one listed in the PARTS INFORMATION on the last page.
NTB22-0672022-08-24. Service bulletin. ENGINE AND ENGINE COOLING. MIL ON WITH DTC P0401 AND/OR P0404 STORED IN THE ECM IF YOU CONFIRM The MIL is ON and DTC P0401 (EGR A FLOW INSUFFICIENT) and/or P0404 (EGR A CONTROL) is stored in the ECM. AND There are no drivability concerns. ACTION 1. Confirm the current ECM part number. 2. Reprogram the ECM, if applicable.
NTB22-0272022-06-08. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT ADAPTIVE/MOBILITY; COMMUNICATION:MANUFACTURER TELEMATICS; ENGINE. B2E01-96 (INTERNAL BATTERY) DTC STORED AS CURRENT IN IVC SERVICE INFORMATION CONSULT has been updated to allow DTC B2E01-96 (Internal battery) to be cleared in the Telematics Control Unit (TCU). If DTC B2E01-96 is Current/Active in the TCU, and No additional Current/Active DTCs are present in the TCU, perform the SERVICE PROCEURE starting on page 2.
NTB22-0262022-06-08. Service bulletin. ELECTRICAL SYSTEM:INSTRUMENT PANEL:FUEL GAUGE:FUEL LEVEL FLOAT/SENSOR/SENDING UNIT; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE; FUEL SYSTEM, DIESEL; FUEL SYSTEM, GASOLINE. SERVICE INFORMATION FOR FUEL GAUGE INACCURATE WITH DTCS STORED IN ECM SERVICE INFORMATION If a fuel level sensor has been diagnosed as sending an incorrect level signal, and one or more of the following DTCs are stored in the ECM, do not replace the entire “Fuel Level Sensor Unit, Fuel Filter and Fuel Pump Assembly” (fuel pump assembly). The fuel level sensor can be replaced separately. • P0460 (FUEL LEV SEN SLOSH) • P0461 (FUEL LEVEL SENSOR) • P0462 (FUEL LEVL SEN/CIRC) • P0463 (FUEL LEVL SEN/CIRC) NOTE: Warranty claims referring to fuel level issues that result in the replacement of the entire fuel pump assembly will be charged back.
NTB17-082E2022-03-12. Service bulletin. FUEL SYSTEM, OTHER; ENGINE AND ENGINE COOLING. DTC P0456 CAUSED BY EVAP LEAK AT VENT CONTROL VALVE O-RING This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
NTB13-097J2022-03-12. Service bulletin. FUEL SYSTEM, OTHER; ENGINE AND ENGINE COOLING. EVAP LEAK DTC P0442, P0455, P0456 INFORMATION This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
NTB21-042A2021-08-06. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM); EQUIPMENT. VOLUNTARY SERVICE CAMPAIGN 2021 SENTRA; SIDE RADAR SENSOR This bulletin has been amended. See AMENDMENT HISTORY on the last page. Discard all previous versions of this bulletin.
NTB21-0532021-07-12. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. 2021 SENTRA; NO START DUE TO BATTERY DISCHARGE THROUGH AUDIO UNIT IF YOU CONFIRM The customer states that the engine would not crank, or cranked slowly and would not start. ACTION 1. Test the vehicle's 12 volt battery using the Midtronics DSS-5000 and recharge, or replace, the battery if necessary. 2. Confirm the current audio head unit software is version 321. 3. If the version is 321, update the audio head unit software to version 420.
NTB21-0272021-05-08. Service bulletin. ENGINE AND ENGINE COOLING. MIL ON WITH DTC P062F AND/OR P0603 STORED IF YOU CONFIRM The MIL is ON and DTC P062F (EEPROM) and/or P0603 (ECM BACK UP/CIRCUIT) is stored, And The customer stated the vehicle was recently started after sitting for an extended period of time (i.e., the battery voltage was low while attempting to start the engine). ACTION 1. Test the vehicle’s 12 volt battery using the Midtronics DSS-5000. Recharge or replace the battery if necessary. 2. Erase all DTCs.
NTB20-0842020-12-09. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM); ELECTRICAL SYSTEM; EQUIPMENT. INTELLIGENT KEY UNIT DTC P161D STORED IN THE ECM SERVICE INFORMATION DTC P161D (IMMOBILIZER) will not cause: • The MIL to turn ON. • The Remote Engine Start to become inoperative. • The “No Key Detected” message to appear. • An impact to any of the vehicle’s functions or performance. If other DTCs are stored with P161D, perform the diagnosis and repair procedures, outlined in the ESM, for the other DTCs first. • After the other DTCs have been resolved and P161D does not clear, proceed with the diagnosis and repair, outlined in the ESM, for DTC P161D.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.