Would appreciate any help on this. My 2012 automatic transmission, Nissan Xterra has a rough Idle. No issues when driving but when I start the engine or stop at a light it tends to idle pretty rough. I've noticed that when I am stopped it will idle rough when the RPM's drop. So, I'm guessing it might be a transmission thing. I've also considered replacing the spark plugs but not sure if that would fix the issue. It's only got 125000 miles on it. Not sure if that's a whole lot for a Nissan. Just hoping there's no major issues. Would appreciate any help, thanks!
Have you checked the usual suspects like vacuum leaks, fuel pressure, spark plugs? Have you tried cleaning your throttle body and MAF sensor with the appropriate spray cleaners? What if anything suspicious shows up when you scan for codes and live data?
