Code P0412 shows on my 2007 Ion Saturn car. How do I fix it?

smog pump ? There is no such thing . What size engine does your ION have ? 2.0 , 2.2 ,2.4 L Has
secondary air injection system .
Secondary Air Injection Pump P0410 P0411 P0412 P0491 P0492

sounds like you will need to replace the indicator relay, normally found in the fuse box

Saturn Ion Complete Workshop Service Repair Manual 2003 2004 2005 2006 2007


for the easy solution download the pdf file

Transmission Fluid Replacement 2002 2007 Saturn Vue

Most are located behind the starter

The P0102 means Mass or Volume Air Flow Circuit Low Input
The P0101 means Mass or Volume Air Flow Circuit Range/Performance Problem
The P0300 means Random/Multiple Cylinder Misfire Detected
The P0171 means System too Lean (Bank 1)
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Ktag ecu programmer

On this website you find fuse box diagram diagram and description for Saturn ION (2007)

Saturn ION 2006 2007 fuse box diagram Auto Genius

Click this link. It will tell you all you need to know, and then some.

http://www.saturnfans.com/forums/showthread.php?p=1323640

Your best bet there, is to run in to one of the big autoparts stores (Autozone, Pep Boys etc) and get a free code scan done. If the code doesn't point you in direction of fix, get back to us with that code(s) and we will be happy to assist you further.
Much cheaper and faster this way.