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Service bulletin A21-068

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)
TypeService bulletin
NHTSA id10200833
Published by NHTSA2021-09-02
Manufacturer's numberA21-068
Manufacturer's date2021-08-31
NHTSA componentFORWARD COLLISION AVOIDANCE; ELECTRICAL SYSTEM

NHTSA's summary

Service Bulletin - The ACC system error message comes on while driving when outside temperatures are low/near freezing.

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

Driver assistance, Electrical system

Vehicles listed
HONDA ACCORD2018, 2019, 2020
HONDA CIVIC2017, 2018, 2019, 2020, 2021
HONDA CR-V2017, 2018, 2019
HONDA INSIGHT2019, 2020, 2021

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
20V7980002020-12-17. ELECTRICAL SYSTEM:PROPULSION SYSTEM:CHARGING:MODULE:SOFTWARE; ELECTRICAL SYSTEM:PROPULSION SYSTEM:DC/DC CONVERTER; ELECTRICAL SYSTEM:12V/24V/48V BATTERY
20206112020-12-10. Electrical
20V7710002020-12-10. 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
19V3830002019-05-21. AIR BAGS:FRONTAL:DRIVER CLOCKSPRING/SPIRAL CASSETTE; ELECTRICAL SYSTEM:HORN; AIR BAGS:FRONTAL:DRIVER SIDE:INFLATOR MODULE; STEERING: STEERING WHEEL/HANDLE BAR
18V6290002018-09-13. BACK OVER PREVENTION: SENSING SYSTEM: CAMERA; VISIBILITY:REARVIEW MIRRORS/DEVICES

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
AATS315492026-10-15. Service bulletin. Tech Line Summary Article - Customers may report that the center display unit changes screens on its own, registers unintended inputs, or operates erratically without user interaction. The condition may be more noticeable when vehicle interior temperatures are elevated.
AAHS091620269022026-09-21. Other. Dealer Message - On August 21st, 2026, American Honda issued a Product Update for certain 2018-2022 Accord and Accord Hybrid models that received the accessory Wireless CarPlay and Android Auto upgrade. Refer to Service Bulletin 26-068 for additional information regarding the Product Update.
ONL6UV090920262026-09-12. Other. 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).
AATS315492026-09-02. Other. Tech Line Summary - Customers may report that the center display unit changes screens on its own, registers unintended inputs, or operates erratically without user interaction. The condition may be more noticeable when vehicle interior temperatures are elevated.
A26-0682026-08-24. Service bulletin. Service Bulletin - On certain 2018-2022 Accord and 2018-22 Accord Hybrid vehicles equipped with the Wireless CarPlay and Android Auto software upgrade, a programming issue within the Wireless CarPlay and Android Auto software may cause an invalid "License Authentication Error" message to appear on the display audio screen after approximately 1,500 ignition ON/OFF cycles.
AEBM082120269012026-08-24. Other. Dealer Message - Due to a software programming issue within the Wireless CarPlay and Android Auto system, an invalid "License Authentication Error" message may appear on the Display Audio screen after approximately 1,500 ignition switch activations ON/OFF.
A26-091 v12026-08-05. Service bulletin. 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.
A26-0912026-08-05. Service bulletin. 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).
AEBM072420269012026-08-05. Other. Dealer Message - Due to software programming issues of the Advanced Driver Assistance System (ADAS), unexpected vehicle deceleration may occur.
ATS300252026-01-05. Service bulletin. Tech Line Summary - Customers who have purchased the Accessory CarPlay /Android Auto upgrade are complaining that a pop-up message appears on the audio unit display stating, “Please insert USB drive containing valid software license file, and press OK button”. When this message is displayed, the audio unit is not responsive to control inputs, however the rear-view camera remains fully functional.