Well, I was able to scan my Pathfinder using my friends ScanGauge. Come to find out, it had 4 stored codes.

Guess the previous owner took out the bulb. The gauge was only able to give out the codes with no description. After looking online this is what I came up with.
P0004 Fuel Volume Regulator Control Circuit High
C1400 Traction Control Valve RF Circuit Failure
C0100 Rear ABS Solenoid #1 Circuit Malfunction
P2002 Particulate Trap Effieciency Below Threshold
I'm kinda stumped on what the P0004 code exactly means. I'm reading on some site that it's a generic code that doesn't mean any thing and on others they say that its cause by a vacuum leak. Anyone have this come up before? The car runs and idles fine so I'm guessing it's something not too serious if it is anything at all. I'm guessing that the P2002 code mean I have a bad cat. I'm not surprised about that one. I can hear some exhaust noise coming from the cat and from reading online they don't tend to last long on Pathys. Has anyone had any issues regarding the C1400 code and the C0100 code? Just want to know if it's something that can easily be diagnosed and fixed. Guess I know where my next pay check is going. lol