Check engine light turned on and then turned off three days later?

Hi,

Do you remember the code? Was it a P0420 or P0430? Let me know that. If it was, they indicate the converter is working below the threshold. As long as you are not experiencing a power loss, you should be okay, but it will keep turning the lamp back on if cleared.

Here is a link you may find of interest:

https://www.2carpros.com/articles/bad-catalytic-converter-symptoms

Let me know the code so I can better help.

Take care,

Joe

Hi,

The P0420 indicates the catalytic converter is working below a specific threshold. Basically, it isn't doing what it should. Usually, this code leads to the need to replace the converter.

On the other hand, I've seen them come on and then the light goes out for years. Since you are not experiencing a power loss, I'm not concerned about it being partially plugged. At this point, continue driving it. If the light returns with the same code, we will need to replace it. Also, if there is no power loss, it won't damage anything if the same code returns. However, it will fail an emissions test (not sure where you are located). Also, I would run it for a long time that way. It will affect the fuel mileage and performance to a degree.

Let me know your thoughts and what I can do to help.

Joe