How to reset check system Honda Odyssey?

If the check system light on your Honda Odyssey is illuminated, it's important to reset the system to ensure proper vehicle functioning. This guide will walk you through the steps to reset the check system on your Honda Odyssey.

Steps to Reset the Check System

1. Turn off the ignition. Make sure the engine is not running.


2. Locate the diagnostic connector. This is usually found under the dashboard on the driver's side.


3. Connect a diagnostic tool to the diagnostic connector. This can be a professional-grade tool or a consumer-level OBD2 scanner.


4. Clear the diagnostic trouble codes. Use the diagnostic tool to clear any stored trouble codes that may be causing the check system light to illuminate.


5. Disconnect the diagnostic tool and turn the ignition back on. The check system light should now be off, indicating the system has been reset.

If the check system light remains on after following these steps, there may be a more serious underlying issue that requires further diagnosis and repair by a qualified mechanic.

Reasons to Reset the Check System

There are several reasons why you may need to reset the check system on your Honda Odyssey:

• Clearing diagnostic trouble codes: If the check system light is illuminated due to a specific problem, resetting the system can clear the stored trouble codes and turn off the light.


• Performing maintenance: After completing certain maintenance tasks, such as replacing the battery or disconnecting the battery, resetting the check system can help ensure the system is functioning properly.


• Troubleshooting issues: If you're experiencing issues with your Honda Odyssey's performance or emissions, resetting the check system can help identify the root cause of the problem.

Remember, resetting the check system is a temporary solution and does not address the underlying issue that caused the light to illuminate in the first place. If the check system light continues to come on, it's important to have your vehicle diagnosed and repaired by a qualified mechanic.

How to reset Honda Odyssey system?

To reset your Honda Odyssey, you can either perform a soft reboot by holding the infotainment system's power button or a factory reset through the on-screen menus. For a hard reset of the entire vehicle's systems, disconnect the negative battery terminal for 15-20 minutes to allow the capacitors to discharge, then reconnect it.
 
To reboot the infotainment system
This video demonstrates how to reboot the infotainment system on a 2018-2023 Honda Odyssey: 48sCarnivautoYouTube · Feb 2, 2025

• Press and hold the infotainment system's power button (often the volume knob) for 5 to 10 seconds.
• A reset menu may appear, or the screen will turn off and then restart on its own. 

To perform a factory data reset (infotainment only)
This video demonstrates how to perform a factory data reset on a 2018-2022 Honda Odyssey: 39sDIYHondaYouTube · Jul 6, 2021

• From the home screen, go to Settings.
• Select System.
• Select Factory Data Reset or Others and then Factory Data Reset.
• Follow the on-screen instructions to confirm and complete the reset. 

To reset all vehicle systems (hard reset) 
You can watch this video to learn how to perform a hard reset by disconnecting the battery: 55sMechanical SpecialYouTube · Apr 22, 2025

• Turn the ignition off.
• Open the hood and locate the battery.
• Disconnect the negative (-) battery terminal first, then the positive (+) terminal.
• Wait for 15 to 20 minutes to allow all capacitors to discharge.
• Reconnect the positive (+) terminal first, then the negative (-) terminal. 

How to clear check engine light on Honda Odyssey?

To reset the check engine light on a Honda Odyssey, the most common method is to disconnect the negative battery terminal for 30-60 seconds and then reconnect it. However, be aware that this is a temporary fix; the light will likely reappear if the underlying problem isn't addressed. Another method is to use an OBD-II scanner to clear the code directly. 
Method 1: Disconnect the battery 
This video demonstrates how to reset the check engine light by disconnecting the battery: 41sHelpful DIYYouTube · Mar 22, 2020

1. Turn off your Honda Odyssey completely. 
2. Open the hood and locate the battery. 
3. Find the negative terminal, which is marked with a "–" and typically has a black cover. 
4. Use a wrench to loosen the nut on the negative terminal clamp. 
5. Carefully disconnect the negative cable from the battery post and set it aside. 
6. Wait for 30 to 60 seconds. For extra caution, press the horn or turn on the headlights with the cable disconnected to drain any residual power. 
7. Reconnect the negative cable to the terminal. 
8. Tighten the nut securely. 
9. Start the vehicle. The light may now be off, but it will return if the problem is not fixed. 

Method 2: Use an OBD-II scanner 
This video shows how to use an OBD-II scanner to diagnose and clear check engine codes: 59sGeorge MelnikYouTube · Mar 15, 2016

1. Locate the OBD-II port, which is usually under the dashboard on the driver's side. 
2. Plug the scanner into the port. 
3. Follow the scanner's instructions to read and then erase the trouble codes. 

Important considerations

• Diagnose the problem first: Before resetting the light, it's best to have the issue diagnosed. The light indicates a problem with the engine or emissions system, and simply turning it off won't fix it. 
• Scan for codes for free: Many auto parts stores offer a free service to scan for trouble codes, which can help identify the problem. 
• Be prepared for the light to return: If the underlying issue, like a loose gas cap, isn't fixed, the light will likely come back on after a few miles. 

Can I manually reset my check engine light?

Yes, you can reset the check engine light yourself, but it is important to first address the underlying problem. You can reset it by disconnecting the negative battery terminal for about a minute, pulling the correct fuse, or using an OBD-II scanner to clear the code. The light will likely come back on if the issue is not fixed, and resetting it may also clear your radio presets and other vehicle settings. 
Methods to reset the light
1. Disconnect the battery 
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This is a common method, but it can reset other electronic settings in your car. 

• Turn off the car and remove the key.
• Locate the negative battery terminal (usually black with a minus sign).
• Use a wrench to loosen the nut on the terminal and pull the cable off.
• Leave the cable disconnected for 30-60 seconds.
• Reconnect the cable and tighten the nut.
• Start the car to see if the light is off.

2. Use an OBD-II scanner 

• Purchase or borrow an OBD-II scanner. Many auto parts stores will scan it for free. 
• Locate the OBD-II port, usually under the dashboard on the driver's side. 
• Plug in the scanner and turn the ignition to the "on" position (without starting the engine). 
• Follow the scanner's instructions to read and then clear the error codes. 

3. Remove the fuse 

• This method is more effective on older vehicles. 
• Locate your fuse box and find the fuse for the Engine Control Unit (ECU) or Engine Control Module (ECM). 
• Use the fuse puller or needle-nose pliers to remove the fuse. 
• Wait for 10-15 minutes, then reinsert the fuse. 

Important considerations

• The underlying problem remains: Disconnecting the battery or clearing the code does not fix the issue. If the problem persists, the light will turn back on. 
• Prepare for smog checks: Clearing the code can reset your vehicle's readiness monitors, which is necessary for passing an emissions test. It may take several days of driving to reset these monitors. 
• Be careful: Do not use a scanner to try and "jump" the diagnostic port. This can damage your car's computer. 

What does it mean when a Honda Odyssey says check charge system?

The charging system warning light comes on when there is a problem with the electrical charging system or when the igni- tion switch is turned on with the engine not running. If the light comes on while driving, stop and check to see if the alternator belt is loose or broken.