Hello, I just changed the valve cover gaskets and spark plugs on my wife's Z. It is a 2006 enthusiast 6sp with 99k miles bone stock. After doing the job, I am getting the p2101 code. I did the gas pedal reset but the code comes back as soon as I start the car. I am going to check all the connectors again. If I don't find anything loose or damaged, I guess my next step will be to clean the throttle body. And ideas of something I may have missed? I am a capable mechanic, just not a nissan tech. Also, while I had the plenum off, my grandson moved the throttle butterfly open and closed. I know that can damage the throttle body actuator, but one time? Thanks for looking.

 

I would double check your harness plugs, also double check the ground connections. I think there are some near the valve covers around the cylinder heads or timing case. Make sure you didn't accidentally pinch a wire harness somewhere and check for any connector pins that may have popped out of place. Gently moving the throttle plate by hand with the ignition off shouldn't hurt it. I just cleaned my throttle body a few weeks ago with it mounted and plugged in (power off of course). I didn't disconnect any of the electronics or even bother with a relearn (it really wasn't that dirty). I didn't notice any adverse effects. No DTCs set, idle didn't change. I also have an 06 Enthusiast 6MT.

Worst case scenario, something in the harness was disturbed or damaged during the work. You may have an electrical short somewhere. Before writing off the TB, I would get a copy of the wiring diagram and check for continuity & shorts if nothing obvious pops up during your detailed inspection. You may also need a bi-directional scan tool to clear stored/learned data for the throttle position, I think there is a "pedal dance" manual method, but if you have access to a good bi-di tool with special functions, that's way faster/easier.
-Icer