I noticed yesterday that the light above the EML light on my dashboard which I believe is the check engine light is now on constantly.

The only thing that I have done recently is change my sidelights to LED's and I'm wondering if that could be the cause? I know they can sometime throw up errors but I don't know if they can cause that light to come on?

Is there anyway to find out what it is or have it reset without paying the dealer a fortune?

Cheers.

Anyone?