codes

[jt]

I have 97 k2500 having these codes po251 po370 p1218 p1641 need help understanding what going on . relocated pmd new pmd any help would be helpful

[sctrailrider]

There is a list of the codes here somewhere, I think they are in the "stickies" or the "faq" sections.....

I'm not sure what they mean without looking them up sorry....

[DmaxMaverick]

The code list is HERE (http://www.thedieselpage.com/members/DTC9698.htm). Anytime you get a bunch of unrelated codes, out of the blue, it's usually an issue with poor grounds, low voltage, or a connector has loosened up.