Hello. I was working on a 99 dodge ram 5.9 engine today. I was using the mini. First the mini wouldn't auto detect vin. So I had to go into Chrysler, and select it manually. But when I went into ecm, read codes, I get some codes in a format I haven't seen before. Like code B1D and U3F. But when I go into eobd and read codes I get a completely different code in the usual format. I get code p1391. Anybody have a problem like this before? Or am I doing something wrong?

Tags: chrysler , codes