about TPS voltage..

[HISSIN50]

If the computer automatically sets to the voltage why do I get check engine lights about my TPS voltage? It doesnt happen at startup, just while driving. Not trying to argue, just curious.

Do you know the reading while driving (when this occurs)? The adaptive control only has so much 'fudge factor' room and you might be on the cusp of hitting a limit code. When the car is hot, either the reading walks (due to heat in wiring or the TPS's tolerances, or the TPS is actually got an issue itself) and the code pops up.

I'd want to take a cold reading (using the supplied ground wire to the TPS, not an external [to the system] ground, as some write-ups have one do), and a hot reading (esp when the CEL pops up).

Good luck.