Hey everyone this would be my first post to the site but have always read stuff on it. I'm having a FI light come on and stay on for c29 only which I've looked up and says it's the stps secondary throttle position sensor. I've read that most of the time a c28 will accompany the c29 code but that isnt happening. If someone could shed some light on the stps and the testing and replacement for it I would appreciate it or if there is a better route I should try please let me know. If I do end up replacing it I heard it was spring loaded and there would be an adjustment that needs to be done after. Information on the adjustment would also be helpful. PLEASE HELP IM AT A LOSS.