My g35 coupe rwd was stuck in snow so I was almost out and had it floored and then my check engine light , traction and slip light came in and the accelerator pedal no longer did anything . I shut it off turned it back on and the rpms were rough going up to about 2,500 rpm and back down that’s how it would idle . If I clear the code it revs up to redline and drops and the engine light pops back on and it goes back to the rough idle . If I try and shift into gear the car shuts right off . When I scanned the code it came up as p1121 and p1123 I believe and the next day I scanned it again and saw p2135 as well . Please give me your help ! I was trying to attach a video but didn’t know if I could . Thank you all !

Check out the FSM

https://www.nicoclub.com/service-manual ... 4%2Fec.pdf

See page EC -408, 553

Don't bother with a video.
Follow the troubleshooting steps as outlined in the FSM.

Good luck