OBD Codes

[vkahanek]

I have a 1995 Nissan 240SX and the Check Engine lite is on. How can I read the engine codes without a Nissan CONSULT or a generic scan tool?
What happens when the ECM enters into fail-safe mode?

[dominicus]

I have a 2002 Altima. It is possible that the gas cap, and filling area is dirty. Clean this up with sand paper and a clean rag Que tip. Cover both areas with some Vaseline. It may take a couple of day's to turn of the light. That was my experience. I am not a mechanic I just got lucky from someone else information