Why does my Honda say ACC?

If your Honda vehicle displays the "ACC" message, it typically indicates that the accessory mode has been activated. This mode allows you to use certain electrical components, such as the radio or infotainment system, without the engine running.

What is the Accessory Mode in a Honda?

The accessory mode, or "ACC" mode, is a feature in Honda vehicles that allows you to use certain electrical components without the engine running. This mode is typically activated by turning the ignition key to the "ACC" position, or by pressing the start button without pressing the brake pedal.

When the accessory mode is active, the "ACC" message will appear on your Honda's display, indicating that the vehicle is in this mode. This allows you to use features like the radio, climate control, and other accessories without draining the battery by keeping the engine running.

Why Would I Use the Accessory Mode?

There are a few common reasons why you might use the accessory mode in your Honda:

• Listening to the radio or using the infotainment system: The accessory mode allows you to enjoy your music or use the infotainment features without the engine running, which can be useful if you're waiting in your car or want to listen to something without draining the battery.


• Charging devices: You can use the accessory mode to charge your phone, tablet, or other electronic devices without the engine running.


• Accessing vehicle settings: Some vehicle settings and features can be accessed while in the accessory mode, such as adjusting the climate control or checking the vehicle's status.

It's important to note that the accessory mode should not be used for an extended period of time, as it can drain the battery if the engine is not running. If you plan to use the vehicle's electrical components for a longer period, it's best to start the engine to ensure the battery remains charged.

How to Exit the Accessory Mode

To exit the accessory mode and turn off the "ACC" message on your Honda's display, you can either start the engine or turn the ignition key to the "Off" position. This will deactivate the accessory mode and return the vehicle to its normal operating state.

How to turn ACC off on Honda?

To turn off Honda's adaptive cruise control, you can either cancel it by pressing the brake or CANCEL button, or switch to standard cruise control by pressing and holding the distance/interval button. To completely turn off all cruise control, press the MAIN button. 
To turn off adaptive cruise control temporarily

• Press the brake pedal: This is the most immediate way to cancel the function, as shown in this YouTube video and this Honda TechInfo page. 
• Press the CANCEL button: On the steering wheel, this button will temporarily disable the system. The ACC indicator will change from green to white, according to this Honda TechInfo page. 

To switch to standard cruise control

• Press and hold the distance/interval button: Press and hold the button that you use to adjust the following distance (it typically has lines or a car icon on it) for a couple of seconds. 
• The system will switch to standard cruise control, which will not automatically slow down for other vehicles. You'll see a change in the icon on your dashboard to indicate the switch, as explained in this YouTube video and this Reddit thread. 

To turn off all cruise control

• Press the MAIN button: This will turn off both adaptive cruise control and other systems like Lane Keeping Assist. The ACC icon will disappear from the dashboard, as shown in this Honda owners guide and this YouTube video. 

How do I reset my ACC system?

To reset your ACC (Adaptive Cruise Control) system, the simplest method is to turn your car off and restart it after waiting a few minutes, as this can clear temporary glitches. If that doesn't work, you may need to manually reset it using a button on your steering wheel or dashboard, check your owner's manual for specific instructions, or perform a more thorough reset like disconnecting the battery for a few minutes. Before a deeper reset, also ensure the radar sensor is clean and not blocked by any obstructions. 
Quick reset methods
This video demonstrates how to clean the radar sensor and perform a quick system reset: 1mDashboard warning lights YouTube · Jul 3, 2025

• Restart the car: Turn your car off completely, wait for two to three minutes, and then restart the engine. This simple reboot can clear temporary glitches. 
• Use a specific button: Some systems have a dedicated reset button on the steering wheel. 
  • Try pressing and holding the "Cancel" or a similar button (like the interval button on a Honda) for a few seconds to switch modes or reset the system. 
  • If you see a message confirming the mode change, you have successfully reset it. 

Deeper reset methods 
This video explains how to reset the ACC system by disconnecting the battery: 52sNexologyYouTube · Aug 23, 2025

• Disconnect the battery: For a hard reset, disconnect the negative battery terminal for at least five minutes, then reconnect it. Some systems may require a longer duration. 
• Check the fuse: Locate the fuse box and check for any fuses related to adaptive cruise control, the radar, or the camera. Replace any that are blown. 
• Consult the owner's manual: Your vehicle's specific owner's manual will have the most accurate instructions for your model, including any unique button combinations or system-specific reset procedures. 
• Professional service: If the issue persists, a professional may need to perform a hard reset or diagnosis using specialized tools, especially if a sensor is misaligned. 

Initial troubleshooting

• Clean the sensor: The radar sensor is usually located behind the front grille or in the lower bumper. Gently clean it with a microfiber cloth to remove dirt, snow, or ice, as obstructions can disable the system.
• Check for damage: Inspect the area around the sensor for any physical damage.
• Check battery voltage: Ensure your car battery is fully charged, as low voltage can cause ACC system failure. 

What causes an adaptive cruise control problem?

Some things that can keep your Adaptive Cruise Control from working properly: Bad weather that affects road visibility. Moisture on the inside or outside of the windshield. Blocked or dirty radar sensors or cameras.

What is the ACC warning on my Honda?

If the ACC sensors detect an unsafe following distance between your vehicle and the one in front of yours, it will activate the ACC warning light.