Check engine light reader.
I've owned y car less than a year and my check engine light has come on for the third time. It's a 2004 Chevy Epica. The first time it came on it was the O2 sensor, so I had that replaced. The second time it came on it was the same thing so I just had it turned off and it's been a good 5 months since then, and it's back on. Now instead of paying $100 every time it comes on to get a mechanic to figure out the code and shut it off, I want to buy one myself. Is there a certain thing to look for when buying one. I saw this one on ebay but since I'm not savvy about this stuff at all I need help. http://cgi.ebay.com/ebaymotors/Car-Scanner-OBD2-EOBDII-CHECK-ENGINE-LIGHT-CODE-READER_W0QQcmdZViewItemQQ_trkparmsZ66Q3a2Q7c65Q3a15Q7c39Q3a1Q7c240Q3a1318QQ_trksidZp3286Q2ec0Q2em14QQhashZitem400036874337QQitemZ400036874337QQptZMotorsQ5fAutomotiveQ5fTools
It seems cheap but if it's going to work the same way I'm excited. Also, are codes different from cars made in the US vs. cars made in Canada?