The truck has been real touchy with the throttle for a couple of weeks now, and I was supsecting the TPS. Today, finally, I got a check engine light and rand the codes. I got the P2121 and P2122 which seem to both point to the TPS, and the P1757 which point to the governor solenoid and sensor on the tranny.

I wanted to post and get feedback before I go ahead with the order and replacment.

A. Is there anything it could be that would throw the TPS codes?
B. I know the governor stuff will be easy, what about the TPS replacement? Any surprises I should be aware of?

Thanks in advance!

 

Had similar issue misdiagnosed several times over the last 10 months. Replaced APPS but didnt fix the problem. Then I replaced the ECM...3 times... that was just a bandaid. Would fix it for a few weeks then go out again for the same APPS code. Finally I ended up having the entire wiring harness replaced and so far so good. The dealer let me have the old harness pieces and I did see some worn places and some dirty and sketchy looking pigtails. So far, The wiring harness seems to have fixed the problem. Heres the link to the thread for when mine acted up.

https://www.dieseltruckresource.com/...s-t312206.html