Engine check light always on. WTF.

[Kaede]

The engine check light been on for like 4-5 months now. Really weird. I mean, my 240sx runs okay, nothing seem to be wrong. Anybody know what could be causing the check light to always be on?

I think the light started to stay on ever since I brought it to a shop to have the CAT and 02 sensor replaced. Could that had cause it?

[BEISSEN]

Ok when you post a topic like this tell us what year you have another thing is this try to search throught the pages and find the topic and see if it has even been posted.But what i can suggest is a do a self diagnosis.Go to www.240sx.org and go to the faqs section.Then look up trouble codes for the year you have and it will tell you how to read and reset the ecu.If you have any other probs with this just e-mail me back at [email protected] or private message me but dont reply here.