GL1 Vehicle Diagnostics for
iPhone/iPad
($99.99, thinkgeek.com)
Wondering how serious that “check
engine” light might be? Get the GL1
Vehicle Diagnostics tool for iPhone—
it works like your very own AutoZone
representative. The GL1 plugs directly
into your car engine’s On Board Diagnostics
(OBD) data and shows you
on your iPhone whether you’ll need
to get it fixed ASAP, or wait for your
mechanic to have a look.
Source.iPhone Life Magazine 2012-11-12