So yesterday the wife and I went on a small road trip, about 300 miles, and the truck ran pretty good the whole way there and most of the way back. Just as we returned home the truck stalled on me, then two more times last night, and there was one time I managed to prevent it by hitting the gas real quick. Could this be a sign of the idle air bypass going bad?

I have recently replaced the tps since the cel flashed me a 25, and I am still getting a 25? I reset the ecu and had the codes wiped could the ecu be going bad? She is also throwing up a 41 and 46 yet the altenator seems to be charging fine, it spikes sometimes (I can see my headlights get bright) but nothing serious.

thanks for looking,
Junkyardvw

 

Yes it could be your IAC, only if it died at idle or low RPM's. And the PCM is telling you the IAC has a problem.

And yes it sounds like your Alt is failing. Take it to most auto parts stores to test for free.

25** Idle air control motor circuit short or open condition detected
41** Generator field not switching properly
46** Charging system voltage too high