If you still have not figured out where the code is, then you probably do not have the stuff in question, or the lids got switched, which happens all to frequently with kids.
The brand is Great Value(Walmart blue label) or Peter Pan. The product codes are all on the top of the lids, and are long but the first four digits are 2111. This indicates the location of MFGR.
If it is not there, and the lids did not get switched, I doubt you have the stuff.
Great Value is the brand I have - no product code printed. There is an indention of a number on the bottom of the jar - the only numbers on there other than the sell by date.
No kids to switch the jar lids around on me yet.
I guess also the fact this is a jumbo size jar and 4/5 of it I have eaten and not gotten sick is another indication this is not one of the tainted jars.