I am driving my car with all mods installed and everything was fine up to two weeks ago. Car is keeping having the same problem, as decribed bellow. I am now driving the car with the laptop constantly with me.

1) The throttle position sensor code P2123 pops up.
2) Then random cylinder missfires code
3) Finally Throttle actuator responce code P1121.

Ofcourse car goes to safe/limp mode.

I use cipher to clear the codes. Yesterday P2123 code would not clear. I turn the UTEC switch to 0 and tried again. All codes dissapeared.
When the car is working under normal driving, there is not any problem. Above 60% throttle @3000RPM, 6PSI boost, car is having the same problem.

I believe it would be the TPS sensor. Though due to the fact that UTEC is also in to the play, I wonder if this is a missmatch. Note that the latest drive by wire software is installed in UTEC.Do you have any good ideas?

 

The multiple misfires are common but the throttle issues are probably utec related, try first to flash it with the latest files and see if that helps.

 

I have already done that. There is no change. Under WOT and about three drive cycles light comes on again. Tommorow I am taking her to local Nissan Workshop to see if they can figure out something.