Ok guys, I found this board and hopefully someone can help me out before I have to take it to the local dealer who has a reputation for raping people on price. After purchasing this vehicle, I drove it for about 1500 mile and got an "emission system needs repair" showing up on the instrument cluster. A buddy of mine asked if it was running rough or using a bunch of gas? No to both. He said it could be the egr valve got stuck open for just a second and tripped the sensor. He cleared the code for me and I then took it out for a drive. I drove it about 3 miles, made a stop, restarted the car and now the place where it used to show "miles to empy tank and/or emission repair" is now completely blank. Can someone advise me on these two issues? Thanks in advance!