After full acceleration, next accelerometer response takes 2~3 seconds.
After restart, it does not happen when mild acceleration.
Error code was P0123 as below.



First, I replaced accel. Pedal assembly but it was not fixed.



Next, I replaced throttle body.
Then It greatly works.



Accelerator pedal sensor may be related with both pedal sensor and throttle body sensor.
For P0123 code, Please replace first throttle body and next pedal assembly.

It may because of contamination of wiper sensor of throttle body.


Thanks.