CEL indicator have been going ON and OFF.

Does anyone know what causes CEL to come on?

I had my service done today and have no problem with the car (It's running just fine).

I dont think it's Cylinder-#2 misfire... can't figure out my problem that is..

 

just find a auto shop and they can check your car by a scanner(forgot what is full name). and will be more cheap, I think should be under $70(1 hour labor)

 

Check your gas tank cap and make sure it's seated firmly.

 

There are many causes for the CEL to come on. A simple cause/fix is a loose gas cap that was already mentioned. If you just had your car serviced, did you tell the service advisor about the CEL? They should have done a scan as part of the service, so it shouldn't cost you additional money. Alternatively, you can always take the car back to the service manager and tell him/her that the CEL comes on after the service and ask them to "fix" it. Good luck, and let us know what the cause was so we can all learn from it.

 

My CEL came on a while ago and it was a loose fuel cap. Nowadays, after I fill up, I first tighten the fuel cap by grabbing the outside of the cap (in other words, put your fingers around the circumference of the cap rather than just the tab in the middle). Then, after giving it a good twist like that, I tighten the cap using the tab in the middle. This has worked so far. Although I can feel that my fuel cap is still a little loose, I have not had a CEL since tightening it as described above.

 

Cyber_X has it right... I'd just like to add (since I've just experienced the problem) that it will take 3 or 4 moderate trips for the light to go out. Not sure why that is, but the service manager was right. BTW, I used a tiny amount of white lithium grease on the threads of the cap to decrease the friction. That also seems to have helped.

 

I had my CEL come on the other day during the rain. Apparently, my filter on my CAI was soaking wet, and when I remove the filter I discovered lots of water in the lower pipe. I drained it, and put it back on. I also fabricated an umbrella using a Sunny Delight container.
Anyways, if you have you installed a CAI, make sure the filter is not wet.

SUNNY D

 

Maybe this will help. I used it on an RSX and it worked. Only difference was that #1 pin was on the other end.CEL