Ran a scan on her, the only code is 21 throttle position sensor,is to high, what do I do to change that?

 

DTC 21 code

Service Manual Book 2 page 6E3-A-46

TP (Throttle Position Sensor) - signal voltage HIGH

The TP sensor provides a voltage signal that changes, as throttle blade opens or closes. Signal voltage should vary from about .6 volt at idle to about 5 volts at WOT (Wide Open Throttle).

The sensor signal is one of the most important inputs used by the ECM (Engine Control Module) for fuel control and for most of the ECM controlled outputs.

1. DCT21 will set if:
* TP sensor signal voltage is greater than 2.5 volts
* Engine at idle (less than 12 grams per second calculated air flow)
* All conditions met for 3 seconds
OR
* TP sensor signal voltage over 4.8 volts with ignition "ON"

With throttle closed, the TP sensor should read between .3 and .9 volt.
If it does not, check throttle cable adjustment or for bent linkage.

2. With the TP sensor disconnected, the TP sensor should go low,
if the ECM and wiring are OK.

3. To test the ground connection, probe the TP sensor connector pin "B" (in
the center of the connector) with a Volt meter lead with the other meter
lead connected to the battery + should show the same voltage when the TP
sensor lead is connected to the battery -. A faulty sensor ground will
cause a DTC 21.

4. If the TP sensor or throttle body is replaced, the ECM must "learn" the TP
sensor idle position voltage with the new components installed. This is
necessary to ensure effective engine torque reduction during ASR events.
The procedure requires a T-1 (Tech 1) or T-100 (CAMS) unit, and is as
follows using a Tech 1.
* Ignition "OFF"
* Connect Tech 1 with Mass Storage/Chassis cartridge
* Ignition "ON"
* Follow menus to reach ABS/ASR features
* Select "F5: TP SENSR LRN"
* Press the up-arrow to begin learn procedure
* Wait for Tech 1 to indicate "COMPLETE"
* Ignition "OFF"
* Disconnect Tech 1

 

Tech 1 unit? is this a diagnostic machine?