Check Engine Light

I own a 06 Honda Pilot with only 104K miles on it. Lately, the Check Engine Light comes on, but after about a day or 2, the light goes away. Then the next week or 2 it will come back on. I had O'Reillys check it and it comes up an ECM and PCM error, and all cylynders are misfiring. I had installed aftermarket LED lights previously without installing load resistors. Then I removed all LEDs completely. It idles and runs fine without problem when the light comes on. It has regular oil changes done regularly and is up to date on maitenence.

My car has 104000 miles.

– Check Engine Light

Check engine light

So i was driving from work yesterday and on my way home my check engine light came on and it wasn't on when i left work or when i started up my car just that morning so today i drove my car to the store and the light disappeared is this normal or did my car just fix itself

My car has 141 miles.
My car has an automatic transmission.

– Check engine light

Check engine light

Hey rocco, i have an 2006 scion xb. I got codes to replace the cat convertor, the upstream and downstream o2 sensors. I bought and replaced all 3. I put the freeway and highway miles on them. The computer reset but, the engine came back on. The down stream sensor code was on. I spoke to a few different people at the parts stores and mechanics. They said imports often cant use brands other than ntk or denso, besides oem. So, i looked around and found a denso four wire which , is what my care takes. I got the sensor but when i did a side by side comparison, they are a little different. Car has 2

– Check engine light