# 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: 10244299
- Published by NHTSA: 2023\-10\-25
- Manufacturer's number: A21080A
- Manufacturer's date: 2023\-10\-17
- NHTSA component: VEHICLE SPEED CONTROL; FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL

## NHTSA's summary

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.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10244299-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10244299-9999.pdf)

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

## Components

Driver assistance, Throttle and cruise control, Adaptive cruise control

## Vehicles listed

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

## 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](/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.
- [APaS02202020901](/bulletins/10171737.md), 2020-02-25, Service bulletin: SERVICE BRAKES, HYDRAULIC; FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is investigating certain 2019\-2020 Civics with a customer complaint of the Adaptive Cruise Control \(ACC\) not working or a clicking noise when the brake pedal is depressed. 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.
- [APaS01162020901](/bulletins/10170612.md), 2020-01-23, Service bulletin: VEHICLE SPEED CONTROL; SERVICE BRAKES, HYDRAULIC; FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is investigating certain 2019\-2020 Civics with a customer complaint of the Adaptive Cruise Control \(ACC\) not working or a clicking noise when the brake pedal is depressed. 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.
- [A19\-051](/bulletins/10159788.md), 2019-05-15, Service bulletin: FORWARD COLLISION AVOIDANCE; FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL. Service Bulletin \- The adaptive cruise control \(ACC\) turns off unexpectedly while it is in use, and the Collision Mitigation Braking System problem. See Your Dealer. message appears on the MID.
- [ATS170204](/bulletins/10108698.md), 2017-07-28, Service bulletin: FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL; LANE DEPARTURE: ASSIST; SERVICE BRAKES. Techline summary article \- Some early production vehicles undergoing PDI or coming in with low mileage may have this issue: ? The ACC \(Adaptive Cruise Control\), Collision Mitigation Braking System, and Road Departure Mitigation indicators are on. ? DTC P2583\-76 \(temporary stop of integrated driver support system \[misalignment millimeter wave radar\] is set. ? The driver information interface shows Adaptive Cruise Control Problem, Collision Mitigation System Problem, and Road Departure Mitigation System Problem messages.

JSON: [/v1/bulletins/10244299](/v1/bulletins/10244299)

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