Check Engine Light Honda Odyssey: Causes and Solutions

Sharing Is Caring:

check engine light honda odyssey

Is your Honda Odyssey check engine light on, and you’re not sure why? It can be an unpleasant experience, but don’t worry! We’ve got you covered. In this blog post, we’ll explore the top causes why your check engine light may have been illuminated in your Odyssey. From simple fixes to more serious issues, we’ll help you understand what’s going on under the hood of your vehicle. So buckle up, and let’s dive into the world of Honda Odyssey diagnostics!

What Causes the Check Engine Light to Come On in Honda Odyssey?

There are several things that can cause the check engine light to come on in Honda Odyssey vehicles. Some common causes are given below:

1: Faulty Oxygen Sensor:

If your Honda Odyssey’s check engine lights are on, one possible cause is a faulty oxygen sensor. The oxygen sensor is in charge of monitoring the engine’s air/fuel mixture. If it is not working properly, the engine will run lean (too much air) or rich (too much fuel). This can cause a decrease in fuel economy and an increase in emissions. A faulty oxygen sensor can also trigger the check engine light.

2: Loose Gas Cap:

If your Honda Odyssey’s check engine light is on, one of the first factors you should check is the gas cap. A loose or damaged gas cap can produce the check engine light to be illuminated, as well as negatively affect your vehicle’s fuel efficiency.

Simply tighten your gas cap until you hear it click if it’s loose. If the gas cap is damaged, you’ll need to replace it. Be sure to get a new gas cap from a Honda dealer or an authorized retailer; using a generic gas cap could void your vehicle’s warranty.

3:Issues with the Ignition Coil or Spark Plug:

If your Odyssey’s check engine light is on, It could be due to an issue with the ignition coil or spark plug. Ignition coils generate the spark that ignites the air/fuel mixture in the cylinders, while spark plugs offer a gap for that spark to leap through.

The check engine light can illuminate if either the ignition coil or spark plug is malfunctioning. In some cases, you may notice that your Odyssey is having trouble starting or that the engine is misfiring. If you suspect that either the ignition coil or spark plug may be at fault, it’s best to have a professional mechanic take a look.

4:Catalytic Converter Problems:

If the check engine light on your Odyssey is on, there might be an issue with the catalytic converter. The catalytic converter is an important part of the exhaust system, and it helps to convert harmful pollutants into less harmful ones. If it isn’t functioning properly, it can cause an increase in emissions, which can trigger the check engine light.

There are several things that can go wrong with the catalytic converter, and they can often be difficult to diagnose. If you suspect that your Odyssey’s catalytic converter may be the problem, It is preferable to bring it to an authorized dealer or mechanic for repair.

How to reset the check engine light on a Honda Odyssey?

Resetting the check engine light on your Honda Odyssey can be a simple task that you can do at home. A lot of times, the light comes on due to a minor issue, such as a loose gas cap or sensor malfunction. Resetting it will give you an indication if there is something more serious that needs attention.

Before attempting to reset the check engine light, make sure to turn off the ignition and all accessories. Then locate the diagnostic port underneath the dashboard on the driver’s side.

Next, use an OBD-II scanner tool to connect to the diagnostic port and turn on your car’s ignition without starting it. Wait for a few seconds until your scanner connects with your vehicle’s computer system.

Once connected, navigate through your scanner menu and find “clear codes”. Select this option and wait until you receive confirmation that all codes have been cleared.

After clearing all codes, turn off your car’s ignition again and disconnect the scanner from its port. That’s it! Unless another problem arises, the check engine light should no longer illuminate, in which case it would reappear after driving some distance.

By resetting your Honda Odyssey Check Engine Light yourself, you save time and money while making sure everything functions properly before heading to a mechanic.

How to troubleshoot the check engine light on a Honda Odyssey?

If you see the dreaded check engine light on your Honda Odyssey, don’t panic. A variety of issues, ranging from minor to serious, can trigger the light. Here are some steps you can follow to solve the issue:

Firstly, try tightening your gas cap. A damaged or loose gas cap can cause the check engine light to come on. If this is the issue, simply tightening or replacing the gas cap should solve it.

If that doesn’t work, consider getting an OBD-II scanner and checking for any error codes stored in your car’s computer system.

Once you’ve identified any error codes, do some online research or consult with a mechanic to figure out.

Other potential causes could include faulty oxygen sensors, malfunctioning catalytic converters or problems with ignition coils. Addressing these issues may require professional assistance from a mechanic.

Remember that ignoring your check engine light could lead to more severe damage down the line and potentially costly repairs in future – so always take action as soon as possible when it appears!


You should not ignore the check engine light on your Honda Odyssey as it is an important indicator. It can signify a minor issue or a major problem with your vehicle’s performance. However, understanding what it means and how to troubleshoot it can save you time and money in the long run.

Remember to always use caution when trying to fix any issues related to the check engine light. If you’re unsure about what needs fixing, consult with a professional mechanic who has experience working with Honda Odysseys.

By following these tips for resetting and troubleshooting the check engine light on your Honda Odyssey, you’ll be able to keep driving safely and confidently without worrying about any unexpected car problems.


Leave a Comment