like kevin asks
which sensor did you replace? it had to be the pedal position pot or you replaced the complete throttle body.
also make sure no broken wires are found AT THE PLUG where the harness plugs in on the throttle body. They are notorious for breaking at the bend or just behind the plug connector where the wires enter it. Just give em a nice tug, if any are broken they should stretch or pull out... if this happens just strip the covering back just enough to solder them back together.

In either case if you find broken wires, or not,.... any time you disconnect a component in this system it requires you to run a recalibration on three things:
- Accelerator Released Position Learn.
- Throttle Valve Closed Position Learn.
- Idle Air Volume Learn ( TAS Fast Normal ).
Failure to perform these learns may cause this code to set.

2 of these can be done easily by doing the following:
Note: When performing these relearns you may use the flashing exclamation mark on the
display as a counter at 1 second intervals.

Accelerator released position learn:
a) Turn key switch to the ON position and count out 2 seconds.
b) Turn the key switch OFF and count out 10 to 12 seconds.
c) Turn the key switch ON and count out 2 seconds.
This learn is completed. You may key off now.

Throttle Valve Closed Position Learn:
a) Turn the key switch ON and then OFF.
b) Count out 5 seconds after turning the key switch.
c) Listen for a movement sound at the Electronic Throttle body. It must operate.
If so, this learn is completed.

the 3rd , idle air volume learn has to be done with the diagnostic program diagnozer, a OBD handset may allow you to do this but i have not tried this method before, only the diagnozer program.

There could be an open or short in the wiring to the throttle body control wiring this is something else to check...check at the connector,this is a good spot for wires to break...you said you replaced the sensors? They are non servicable on these engines,have to replace the whole throttle body assembly,is that what you did??

PEDAL DANCE
clearing codes for K21 - K25 engines

1) turn key switch on, after 3 seconds fully depress acc. pedal 5 times w/in 5 seconds.
2) after 7 seconds, press and hold down acc. pedal for about 10 seconds, until hour meter starts blinking.
3) release pedal and push down again, hold for another 10 seconds
4) hour meter should be on w/ no codes
5) shut off key, and turn back on w/ no codes.

To do a relearn for the trottle position closed turn key from off to on...then turn off holding key back in the off position for 5 seconds...turn key back to on and listen for a click from the throttle body...