[warrior86]

P1507- Idle Air Control Under Speed Error.

I just bought one of them gaskets off eBay where the 2 Middle holes are cut down to the same size as the ones the bolts go into. I believe 9/32.. and it definitely did a good for my idle and everything like it was suppose to.

I decided to run a diagnostic on it, and though there were no check engine lights out or anything, my first scan tool brought it up as a potential problem, but it really didn't list it as a major problem through the software like it does other DTC's.

Then i ran another scan tool, one that was more advanced and it didn't report any errors.

I'm wondering what this is and what under speed error means.

IS IT because there is not enough air going through those small holes.. and what is the negative above not making the holes as big as the main ones in the IAC?