Car doesn't pass 2000 Rpms
 

A buddy of mine owns a 350z with a aps turbo kit. He just replaced the throttle body and the car does not go over 2000rpms and he has 3 codes on the car p1122-electronice throttle control actuator, p1564 ascd steering switch and, p1126 throttle control motor relay. Could this be a faulty throttle body or something else? could the car be in limp mode cause of these codes?

Bump anyone know what could be causing this? he did not do the t/b relearn.

If he hasn't done the relearn after replacing the throttle body, I would go ahead and do that first. If it's a good throttle body it should clear those right up.