Andrew's Comments

Yeah, maybe. Sorry, I saw it at Costco and didn't stop to think there might actually be more than one of these types of gizmos.

Going to buy it today.  I have a feeling the light has gone on again due to a loose gas cap, which is a pretty cheezy item on the "check engine" list in my opinion.  Wonder how many visits to the dealer that has generated during which the dealer just happened to find something else wrong with the car...

Might still be useful gearhead gadget.  

So it gave you the gascap as a possible code?  Or something indecipherable? 

But Costco will take it back without receipt....they have a record of when you bought it on your costco membership.  Worst case they give you store credit...and there is ALWAYS something you can buy at Costco!

Well, that's good news, cause I need the refund.  As for what it told me - I never used it.  I just filled up my wife's car and made sure I screwed the cap on tightly and, lo and behold, the light went off.  yeesh.