Ok so I have been having trouble with this for months now. I have changed the MAF, old vacuum lines and checked for leaks, leaking pressure relief valve (puck valve). The idling seems to be a lot more smooth but it is a little rough when cold. It seems that the only thing left to change is the O2 sensor. Does anyone have a suggestion of which one to change? Thank you for any help.

 

My subject is incorrect. I meant to say OBD P0171. I went ahead and purchased a new front 02 sensor. I will let you know if it works out.

 

Well I reset the CEL and drove for 16 miles and no CEL. I am sure that the light will come on at some point. The car drives a lot better but when the car is in gear but with the brake applied while stopped it seems to misfire a little. If anyone has any suggestion I would appreciate it. Also does anyone know what the clicking noise that seems to be coming from the passenger side of the car just in front of the glove box is? It has always made this noise when you turn off the car but seems to be doing this when the car is in gear but with the brake applied in the stopped position.