# Service bulletin A21080A

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.

- Type: Service bulletin
- NHTSA id: 10200835
- Published by NHTSA: 2021\-09\-02
- Manufacturer's number: A21080A
- Manufacturer's date: 2021\-08\-31
- NHTSA component: FORWARD COLLISION AVOIDANCE

## NHTSA's summary

"ServiceNews Article \- When returning the vehicle to the client, inform them that if the message Adaptive Cruise Control System Problem comes back on when the vehicle is driven in freezing conditions, it is likely because of snow or ice buildup on the radar. Advise the client of the following procedure to clean the front grille where the radar is located."

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10200835-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10200835-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Driver assistance

## Vehicles listed

- 2018 to 2020 HONDA ACCORD
- 2017 to 2021 HONDA CIVIC
- 2017 to 2019 HONDA CR\-V
- 2019 to 2021 HONDA INSIGHT

## Recalls for the same vehicles and component

- [20V771000](/recalls/nhtsa/20V771000.md), 2020-12-10: ELECTRICAL SYSTEM:BODY CONTROL MODULE:SOFTWARE; BACK OVER PREVENTION: SENSING SYSTEM: CAMERA; VISIBILITY/WIPER; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM; VISIBILITY:POWER WINDOW DEVICES AND CONTROLS; EXTERIOR LIGHTING
- [18V629000](/recalls/nhtsa/18V629000.md), 2018-09-13: BACK OVER PREVENTION: SENSING SYSTEM: CAMERA; VISIBILITY:REARVIEW MIRRORS/DEVICES

## Other bulletins for the same vehicles and component

- [ONL6UV09092026](/bulletins/11037300.md), 2026-09-12, Other: LANE DEPARTURE: ASSIST; FORWARD COLLISION AVOIDANCE: WARNINGS; FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL. Owner Notification Letter \- Honda has developed software updates to the Honda Sensing system to enhance driver experience by modifying the circumstances when the advanced driver assist system \(ADAS\) decelerates the vehicle or the extent of deceleration. The software covers Adaptive Cruise Control \(ACC\), Collision Mitigation Braking System \(CMBS\), and Road Departure Mitigation \(RDM\).
- [A26\-091 v1](/bulletins/11035885.md), 2026-08-05, Service bulletin: FORWARD COLLISION AVOIDANCE: WARNINGS. Service Bulletin \- American Honda has identified a condition that may affect Collision Mitigation Braking System \(CMBS\) operation. Due to software programming issues of the Advanced Driver Assistance System \(ADAS\), unexpected vehicle deceleration may occur.
- [A26\-091](/bulletins/11035781.md), 2026-08-05, Service bulletin: LANE DEPARTURE: WARNING; FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL; FORWARD COLLISION AVOIDANCE: WARNINGS. Service Bulletin \- Honda has developed software updates to the Honda Sensing system to enhance driver experience by modifying the circumstances when the advanced driver assist system \(ADAS\) decelerates the vehicle or the extent of deceleration. The software covers Adaptive Cruise Control \(ACC\), Collision Mitigation Braking System \(CMBS\), and Road Departure Mitigation \(RDM\).
- [AEBM07242026901](/bulletins/11035777.md), 2026-08-05, Other: FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL; FORWARD COLLISION AVOIDANCE: WARNINGS. Dealer Message \- Due to software programming issues of the Advanced Driver Assistance System \(ADAS\), unexpected vehicle deceleration may occur.
- [A21080A](/bulletins/10244299.md), 2023-10-25, Service bulletin: VEHICLE SPEED CONTROL; FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL. Service News \- If an Adaptive Cruise Control System Problem comes back on when the vehicle is driven in freezing conditions, inform the customer it is likely due to snow or ice buildup on the radar. Advise the customer of the following procedure to clean the front grille where the radar is located.
- [A21\-068](/bulletins/10200833.md), 2021-09-02, Service bulletin: FORWARD COLLISION AVOIDANCE; ELECTRICAL SYSTEM. Service Bulletin \- The ACC system error message comes on while driving when outside temperatures are low/near freezing.
- [APaS03302021901](/bulletins/10189850.md), 2021-04-05, Service bulletin: BACK OVER PREVENTION. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is searching for certain 2016\-2020 Civics with a customer complaint of the rear view camera screen appearing blank, foggy or blurry. To better understand the cause of this condition, AHM would like to collect specific information from the vehicle prior to you attempting a repair of any kind.
- [APaS03102021902](/bulletins/10189043.md), 2021-03-16, Service bulletin: BACK OVER PREVENTION; ELECTRICAL SYSTEM. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is searching for certain 2016\-2020 Civics with a customer complaint of the rear view camera screen appearing blank, foggy or blurry. To better understand the cause of this condition, AHM would like to collect specific information from the vehicle prior to you attempting a repair of any kind.
- [APaS02152021902](/bulletins/10187531.md), 2021-02-26, Service bulletin: EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; BACK OVER PREVENTION; ELECTRICAL SYSTEM. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is searching for certain 2016\-2020 Civics with a customer complaint of the rear view camera screen appearing blank, foggy or blurry. To better understand the cause of this condition, AHM would like to collect specific information from the vehicle prior to you attempting a repair of any kind.
- [APaS01222021905](/bulletins/10186018.md), 2021-01-30, Service bulletin: BACK OVER PREVENTION; ELECTRICAL SYSTEM; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is searching for certain 2016\-2020 Civics with a customer complaint of the rear view camera screen appearing blank, foggy or blurry. To better understand the cause of this condition, AHM would like to collect specific information from the vehicle prior to you attempting a repair of any kind.

JSON: [/v1/bulletins/10200835](/v1/bulletins/10200835)

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