About a week ago my SES light popped on...again. It did this before with a previous tune, and now it did it again. Its the TPS code "P0121". With the first tune for my after my cam swap, the track ran ok. I had to crack the throttle blade to get it to idle. Then the it threw the SES light, and it ran like crap.

Allen sent me a new tune, and before I put it in, I reset the throttle blade back to stock. It ran like a bat outta hell! Then about a week ago the code was thrown again. It runs like crap!

I've tried turning the key on with the TPS unplugged to reset it, and I've disconnected the battery for like 8 hours. Nothing will clear the SES light, and it still runs bad. I know I could just delete the code, but it's just going to come back. HELP ME PLEASE!!!

 

I had the same problem with my 01 GMC. If you put it back stock give it some time to learn it again before you try adjusting the blade anymore.

 

I have like almost 300miles of relearn time on this tune....and with the throttle blade back to the stock setting.

 

Does anyone have any idea how to reset the throttle body?

 

Try resetting the PCM by pulling the fuses (2 fuses ECM BAT and ECM something else). You can do a search to find the right fuses.
Then try doing an idle relearn - start engine, set park brake, put in drive, idle 5 min in gear, then put in park and idle 5 more min.