Originally Posted by lildaddym
How would I know if I have any P-codes? I've had the car about 24 hours...
You would have a CEL ( Check Engine Light ) if it ain't also burned out, or run by AutoZone / Advance and they will hook up a reader ( at least most will )
But the UltraGuage is the best $70 you can spend.
You can monitor about 49 different things, my favs are the engine temp and inlet air temp.
The avg and instant MPG are not so bad either.