code OBDII OBD check engine

[Hylander]

Ghost codes in both systems! That may be a first.

Actually I think, from what I've read, that these are both transmission codes. The 45 is no used in earlier OBDI, I did find a couple of references for 97-up, including this one, which might also explain your 1898, which is almost certainly another transmission code, though apparently undocumented:

http://www.justanswer.com/questions...97-jeep-cherokee-with-3-speed-automatic-trans

That link referances Sensors that do not exist on an AW4