My check engine light came on 2 days ago, i checked my ol and stuff to make sure. I dont hear anything funny. What is wrong? what should i do?

Its a 2000 v6 4.0L

 

get yourself down to autozone and have them pull the code for you and see what is wrong

 

Autozone will pull the codes for free, but before you buy anything there, post the code number here and we can help you with the repair. Sometimes AZ will try to sell you something you don't need (EGR valves come to mind...).

 

egr's o2 sensors, you name it they will try to sell it to you, thats why they offer the service.

its all a scam to sell parts to people that have no idea whats wrong.

 

I've had god luck with AZ reading codes for me, never tried to sell me anything, maybe because the one near me is always really busy, lots of volunteer customers. I've also used their "loan a tool" service a few times, that comes in handy too.

 

Yeah just b/c the code may read o2 sensor its usually another part that made that o2 sensor throw out a code, anyone correct me if im wrong, but an o2 sensor "smells" what is going on in the exhaust system, as for how much or not enough fuel is being burned. If the exhaust fumes are not what the o2 sensor thinks they should be it will turn that check engine light on. Look for other defective parts that may have made one of the o2 sensors go bad.