GenVibe - Community for Pontiac Vibe Enthusiasts

i was having problems with the engine accelarating when started in the mornings from 1,200 up to 2,000 so i replace the IAC and that solved the problem but now i got new codes: PO441,442 and 446. what is wrong now?

those are related to not being able to put a vacuum on the gas tank, part of the evaporative emissions control

One of my vibes threw some of those codes, was never able to solve it, so I just kept my code reader hooked up and cleared the CEL whenever it came up, so I'd be able to tell if something else happened to cause a CEL.

It can be something simple as a gas cap not screwed on tight, or as evasive as a pinhole in a hose somewhere. Since the new codes came up after you did work on it, hopefully yours will be something like a vacuum hose not hooked up or hooked up wrong

thanks for the info, i'll check those hoses !
those codes doesn't affect the inspection?

salamander162 wrote: ↑Sat Mar 18, 2023 3:49 pm
those codes doesn't affect the inspection?

I live in a county that doesn't require periodic emissions testing, but I'd bet money they'd cause inspection to fail

after all it was just a simple thing: clean the gas cap

so thanks guys for the help and info

The best fixes are the ones that don't cost. Hope you have lots of CEL-free miles ahead