Buy a code checker at an auto parts store, I bought mine 4 years ago for $79.00. It will allow you to checck the code and also to reset the code. Codes are set in the vehicle when the problem is there for 3 driving cycles. My truck(rest in peace buddy) was showing a code and I reset it and went to get emmissions the next day and passed. You can also reset the code by disconnecting the battery.
_________________________
would the boy you were be proud of the man you are

Growing old ain't for wimps
Lonnie Gane