In article >, says...
> Hi Jeff,
> Dodge truck? I don't have the chart for their numbers, they may
> like other Chrysler products such as the Cruiser:
> http://www.ptcruizer.com/computer-codes.html of which 442, 455, and 457
> are similar numbers to the Grand Cherokee we were talking about, of
> which a loose cap may have thrown P0442, P0455 P0456, P0457, and/or
> P0624: http://www.wjjeeps.com/faultcodes.htm
> God Bless America, ßill O|||||||O
> http://www.billhughes.com/
>
> Jeff Strickland wrote:
> >
> > Because in the past 6 weeks the Check light came on on my daughter's truck,
> > and the code was P0440. There were other codes as well, but they all related
> > to an open in the fuel system somewhere. She said that she found the gas cap
> > not fitted properly, and this can contribute to the other codes we got. We
> > got three codes in total, but I only remember the P0440 without looking at
> > the choices.
> >
> > All I was pointing out was that the link you posted, just by chance, lists
> > two P0439 codes, but the second of them should be P0440. P0440 simply means
> > the Evaporative Control System is open. Check another ODB II Code List to
> > confirm. And, the second digit is 0 (zero) not O (uppercase o).
>
I just got a 0442 on my 01' WJ and it was the darned gas cap. $10.95
later from the dealer and my problem was fixed