Recently I had worked on a friends car and did a ton of maintenance. The car ran perfectly fine for about a week or 2, one day from coming back from the store he calls me and tells me he started his car after getting back out of the store and he's getting little to no throttle reponse. I headed over and checked it out, car was idling high around 1k and if you pressed the pedal it would only go to maybe 1,400 rpm. Limped the car home thankfully it was a block away. I took off the intakes and turned the car to on and off and watched the throttle bodies do its sequence when the car turns off. passenger side opened 100% instantly and driver side lagged, opened 25%. So I thought needs new driver side throttle body, got a used one and installed it to find out its doing the same thing. Going through forums I've seen the code p2135 is for the passenger side throttle body. so I'll be replacing that and seeing if it fixes the issue. If anyones got any knowledge to the problem I would appreciate that.

 

I recently got this code also. Does the TCS and ABS light also come on?

My situation might be different since I am running big throttle bodies, but what I ended up doing was unplugging the accelerator pedal (thinking ours had a stopper like the 350z but it doesn't) and also swapping the throttle bodies left to right to see if the code follows. I unplugged my battery before doing all of this of course.

Some additional notes, prior to getting the code and going into limp mode, I've noticed my AFR and fuel trim differed significantly between bank1 and bank 2 but the throttle body voltages were fairly close.

After doing everything, my AFR and fuel trim for both banks are matching now. I think one of the throttles was slightly more open than the other considering I also got a P2119 code with the P2135.

 

I got the code again not long ago and decided to swap out the harness adapter for my 75mm TB. I was using the harness I had from EPS with my 75mm kit, but switched out out for the harness that was provided for the 75mm kit. Car has been driving fine since then.