2021-2024 Nissan TCU DTCs B2E4B-06, B2E60-06, B2E61-06

Nissan has released Technical Service Bulletin (TSB) NTB21-037C to address specific diagnostic trouble codes (DTCs) related to the Telematics Control Unit (TCU) in several 2021-2024 models. This bulletin clarifies that certain DTCs, including the Nissan TCU B2E4B-06, are not indicative of a faulty TCU but rather a cloud-server issue.

Symptoms

Owners of affected Nissan vehicles may experience problems with their NissanConnect® Service remote commands. This functionality issue is typically accompanied by specific diagnostic trouble codes (DTCs) being displayed as current (CRNT) within the Telematics Control Unit (TCU).

Fault Codes / DTCs

If your vehicle exhibits the symptoms described, a diagnostic scan may reveal one or more of the following DTCs as CRNT in the Telematics Control Unit (TCU):

Code
B2E4B-06
B2E60-06
B2E61-06

Diagnosis / Trigger Conditions

Nissan has identified that these DTCs, including the Nissan TCU B2E4B-06, are not caused by a malfunction of the TCU itself. Instead, they stem from an issue with a cloud-server that is related to the TCU's operation. The diagnosis for these specific DTCs was mistakenly added to some Electronic Service Manuals (ESMs) and should be disregarded as an indicator of a hardware fault.

Important Warnings

Nissan explicitly states critical instructions for technicians and owners regarding this issue:

• "Do NOT replace the TCU. Replacing the TCU will not resolve the concern."
• "Do NOT replace any parts."

These warnings underscore that the problem is not a hardware failure requiring component replacement, but rather a software or server-side issue that Nissan is addressing through a specific communication protocol.

Repair Procedure Summary

To address the Nissan TCU B2E4B-06 and related DTCs, technicians are instructed not to replace any parts. Instead, a specific email procedure must be followed:

1. Compose an Email: Send an email to [email protected].
2. Provide Information: The email must include the following details:
   • Name
   • Phone Number
   • Dealer Name
   • Dealer Code
   • Vehicle Identification Number (VIN)
   • The specific DTC(s) displayed as CRNT
   • A photo of the Unit ID Information screen.
3. Locate Unit ID Information: The Unit ID Information screen can be accessed through the vehicle's infotainment system by navigating to Settings > NissanConnect® Services > Unit ID Information.

Nissan advises allowing up to 48 business hours (Monday-Friday) for a response to the email, which will provide next steps for resolution.

Owner Action

If you own a 2021-2024 Nissan Rogue, Sentra, Pathfinder, or ARIYA and are experiencing issues with NissanConnect® Service remote commands, especially if accompanied by diagnostic trouble codes like the Nissan TCU B2E4B-06, B2E60-06, or B2E61-06, contact your authorized Nissan dealer. Inform them about the symptoms and reference Technical Service Bulletin NTB21-037C. It is crucial to understand that the Telematics Control Unit (TCU) should not be replaced for this specific issue, as it will not resolve the underlying problem.

Bulletin History

This Technical Service Bulletin has undergone several revisions:

Published Date	Reference	Description
May 6, 2021	NTB21-037	Original bulletin published
August 5, 2021	NTB21-037A	APPLIED VEHICLES revised
December 19, 2022	NTB21-037B	APPLIED VEHICLES revised
July 31, 2023	NTB21-037C	TITLE, APPLIED VEHICLES, IF YOU CONFIRM, and Step 1 revised, NOTE references changed to HINT

---

Source: NHTSA ID: 10240537