Service bulletin NTB21-067

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	10200020
Published by NHTSA	2021-08-06
Manufacturer's number	NTB21-067
Manufacturer's date	2021-07-29
NHTSA component	ELECTRICAL SYSTEM; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT

NHTSA's summary

HIGH FREQUENCY NOISE WITH AUDIO SYSTEM DISPLAY ON IF YOU CONFIRM There is a high frequency (17 kHz) noise with the audio system display screen turned ON, NOTE: • The 17kHz range may not be audible to some people. • Noise can be heard with the audio system ON or OFF. AND The high frequency noise is not heard with the audio system display screen turned OFF, AND Service Comm does not show PM991 applies to the vehicle you are working on. HINT: If Service Comm shows PM991 does apply to the vehicle you are working on, perform PM991 and do not apply this bulletin. ACTION 1. Confirm the current Audio Control Unit software version is 321 or 420. 2. Update the Audio Control Unit software version to 423.

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, Equipment and accessories

Vehicles listed
NISSAN SENTRA	2021

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
NTB19-042F	2025-02-25. Service bulletin. AUTOMATIC EMERGENCY BRAKING WARNING LIGHT BLINKING APPLIED SYSTEMS: Vehicles equipped with a lane camera (see Figure 1) SERVICE INFORMATION If the Automatic Emergency Braking (AEB) warning light or is blinking (but not illuminated steadily) or the customer states it is blinking, and there are no related DTCs, inspect the windshield. A blinking AEB warning light may occur under the following conditions: • When contamination or foreign material adhere to the lane camera viewing window on the windshield. • When driving while it is snowing or when frost forms on the lane camera viewing window on the windshield. • When the lane camera viewing window on the windshield is temporarily fogged up. Figure 1 Nissan Bulletins are intended for use by qualified technicians, not 'do-it-yourselfers'. Qualified technicians are properly trained individuals who have the equipment, tools, safety instruction, and know-how to do a job properly and safely. NOTE: If you believe that a described condition may apply to a particular vehicle, DO NOT assume that it does. See your Nissan dealer to determine if this applies to your vehicle. HINT: o Refer to the applicable ESM for diagnosis if DTCs are present in the Laser/Radar, ICC/ADAS, or Lane Camera systems. o For further information: • Refer to the following pages. • Use the search keyword “blinking” in the ESM.
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NTB21-115B	2024-09-04. Service bulletin. FALSE ACTIVATION OF AEB OR FCW APPLIED VEHICLES: 2021-2022 Altima (L34) 2022-2023 Frontier (D41) 2020-2022 Sentra (B18) APPLIED DATES: Altima: All Frontier: All Sentra: Built on or before March 10, 2022 APPLIED SYSTEMS: Automatic Emergency Braking/Forward Collision Warning IF YOU CONFIRM The customer states they have experienced false activation and/or unexpected braking of the Automatic Emergency Braking (AEB) or Forward Collision Warning (FCW) system, AND There are no related DTCs stored. ACTION 1. Confirm the current ICC/ADAS 2 part number. 2. Reprogram the ICC/ADAS 2, if applicable. IMPORTANT: The purpose of ACTION (above) is to give you a quick idea of the work you will be performing. You MUST closely follow the entire SERVICE PROCEDURE as it contains information that is essential to successfully completing this repair.
NTB22-027B	2024-09-04. Service bulletin. DTC B2E01-96 (INTERNAL BATTERY) STORED AS CURRENT IN IVC This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin. SERVICE INFORMATION The APPLIED VEHICLES that come equipped with a factory installed SOS switch, located near the overhead map lamp, also come equipped with a wireless communication device called a Telematics Communication Unit (TCU). With an active NissanConnect® Services subscription, the TCU communicates with the Nissan Data Center to provide various security and convenience services. CONSULT has been updated to allow DTC B2E01-96 for “Internal battery” to be cleared in the 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 PROCEDURE starting on page 2.
NTB21-037D	2024-09-04. Service bulletin. DTCS B2E4B-06, B2E60-06, B2E61-06 DISPLAYED AS CRNT IN THE TCU This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin. IF YOU CONFIRM The customer experiences an issue with the NissanConnect® Service remote commands, AND Any of the following DTCs are displayed as CRNT in the Telematics Control Unit (TCU): • B2E4B-06 • B2E60-06 • B2E61-06 HINT: These DTCs are caused by an issue with a cloud-server that is related to the TCU. ACTION 1. Do NOT replace the TCU. Replacing the TCU will not resolve the concern. 2. Send an email to NTB21-037@Nissan-Usa.com. IMPORTANT: The purpose of ACTION (above) is to give you a quick idea of the work you will be performing. You MUST closely follow the entire SERVICE PROCEDURE as it contains information that is essential to successfully completing this repair.
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NTB21-106B	2024-07-19. Service bulletin. DTC C1A17-49 OR C2580-49 STORED IN LASER/RADAR This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
NTB20-074B	2024-07-19. Service bulletin. BCM SERVICE INFORMATION This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
NTB20-073C	2024-07-19. Service bulletin. INTELLIGENT KEY UNIT SERVICE INFORMATION This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
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