To see if your throttle body or T8 is causing your fault codes follow the following steps

Step 1 Scan with a Tech2 to see which fault codes you have.
Check off the following after scanning:

1 only 1 throttle body related fault code or P1681 - If yes go to this page
2 more than 1 throttle body related fault code see step 2

3 more than 1 throttle body related fault code and P1682 see step 2 and onwards

Step 2