2021 Nissan Sentra AEB False Activation TSB
A technical service bulletin (TSB) has been issued for the 2021 Nissan Sentra regarding false activation and unexpected braking of the Automatic Emergency Braking (AEB) or Forward Collision Warning (FCW) system. The fix involves reprogramming the ICC/ADAS 2 module.
Owners of the 2021 Nissan Sentra may experience a concerning issue where the Automatic Emergency Braking (AEB) or Forward Collision Warning (FCW) system activates without a legitimate obstacle. This can lead to unexpected braking, which can be startling and potentially hazardous. This technical service bulletin (TSB) addresses the Nissan Sentra AEB false activation problem.
Symptoms
If you own a 2021 Nissan Sentra, you might notice the following symptoms related to this issue:
- "false activation and/or unexpected braking of the Automatic Emergency Braking (AEB) system"
- "false activation and/or unexpected braking of the Forward Collision Warning (FCW) system"
These activations occur without an actual collision risk, causing the vehicle to brake unexpectedly.
Diagnosis / Trigger Conditions
Technicians investigating this issue should note that the problem is typically present even when "There are no related DTCs stored." This means that standard diagnostic trouble codes (DTCs) may not be triggered, making the owner's description of the symptom crucial for diagnosis.
Repair Procedure Summary
To resolve the Nissan Sentra AEB false activation issue, the recommended action involves updating the vehicle's software. The process is as follows:
- A technician will first confirm the current part number of the ICC/ADAS 2 control unit in your vehicle.
- If applicable, the ICC/ADAS 2 module will then be reprogrammed with updated software.
This reprogramming is designed to correct the logic that leads to the false activations of the AEB and FCW systems.
Required Tools or Parts
The primary requirement for this repair is the appropriate software update for the ICC/ADAS 2 module. Technicians will need access to Nissan's diagnostic and programming tools to perform the reprogramming effectively. The specific "ICC/ADAS 2 part number" will be checked to ensure the correct software version is applied.
Owner Action
If your 2021 Nissan Sentra is experiencing false activation or unexpected braking from its AEB or FCW systems, you should schedule an appointment with an authorized Nissan dealership. Describe the symptoms you are experiencing to the service advisor. The dealership will be able to perform the necessary diagnostic checks and apply the software update to resolve the Nissan Sentra AEB false activation problem.
Source: NHTSA ID: 10206386
Frequently Asked Questions
- What does 'false activation of AEB' mean for my 2021 Nissan Sentra?
- False activation of AEB (Automatic Emergency Braking) means your 2021 Nissan Sentra's braking system engages unexpectedly, even when there is no actual obstacle or imminent collision, causing the vehicle to brake suddenly.
- How is the unexpected braking issue in my 2021 Nissan Sentra resolved?
- The issue of unexpected braking or false activation of the AEB/FCW system in your 2021 Nissan Sentra is resolved by reprogramming the ICC/ADAS 2 control unit with updated software at a Nissan dealership.
- Will my 2021 Nissan Sentra show a DTC (diagnostic trouble code) for this AEB problem?
- According to the technical service bulletin, the false activation and/or unexpected braking of the AEB or FCW system in your 2021 Nissan Sentra typically occurs with 'no related DTCs stored'. This means a check engine light or specific fault code may not appear.
- What should I do if my 2021 Nissan Sentra's Forward Collision Warning (FCW) system is acting up?
- If your 2021 Nissan Sentra's Forward Collision Warning (FCW) system is experiencing false activations or unexpected braking, you should contact your local Nissan dealership to have the ICC/ADAS 2 module inspected and reprogrammed as per the TSB.
What Nissan Sentra owners report
Counted from the records in our database across 45 model years.
- 5,975
- Owner complaints
- 62
- Recalls
- 710
- Service bulletins
- 600
- Crashes reported
- 123
- Fires reported
- 523
- Injuries reported
The 2021 model year
133 complaints, the 21st most of 45 model years on file. Owners reported 15 crashes, 1 fire and 9 injuries for this year, which also has 3 recalls on file.
Service Brakes and Electric and Forward Collision Avoidance, the system this article covers, accounts for 726 of 5,975 complaints (12%), including 51 for 2021.
Complaints by model year
| 2001 | 236 | |
|---|---|---|
| 2002 | 318 | |
| 2013 | 638 | |
| 2014 | 380 | |
| 2015 | 352 | |
| 2016 | 270 | |
| 2017 | 231 | |
| 2019 | 223 | |
| 2020 | 207 | |
| 2021 | 133 |
Most-reported systems
- Power Train — 1,287
- Electrical System — 839
- Air Bags — 779
- Engine — 679
- Engine And Engine Cooling — 650
Latest recalls for the 2021 model year
- 23V628000 — Back Over Prevention (Sep 2023)
- 23V581000 — Steering (Aug 2023)
- 21V461000 — Steering (Jun 2021)
Recent owner reports about service brakes and electric and forward collision avoidance
The contact owns a 2021 Nissan Sentra. The contact stated that while her son was driving at approximately 30-35 MPH, a yellow triangle warning light illuminated, and the vehicle independently applied the brakes forcefully and made a sharp left turn.
Read owner complaints →I purchased this vehicle brand new in 2021. Since then, I have experienced a very concerning safety issue on multiple occasions involving the automatic emergency braking system.
Complaints are owner reports filed with NHTSA. They are unverified, and counts depend on how many vehicles were sold, so they are not a failure rate.
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2021 Nissan Sentra False AEB/FCW Activation TSB
Owners of 2021 Nissan Sentra vehicles may experience false activation or unexpected braking from the Automatic Emergency Braking (AEB) or Forward Collision Warning (FCW) systems. Nissan Technical Service Bulletin NTB21-115A provides a software update to the ICC/ADAS 2 module to resolve this issue.
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