Jeep Liberty code question
 

What code is associated with a loose gas cap? My wife's '03 Liberty gets an occasional O2 sensor code. I was blaming it on the ethanol but got to thinking about the gas cap...

I think its 0318.

There are two possibilities for this fault. P0442 is EVAP System Small Leak Detected. There is another one for EVAP System Large Leak Detected, but I can't remember the number.

A failure in this system shouldn't cause any O2 codes at all.

Thanks for the info. I guess I'll leave it alone until it has to be fixed...[nonono]