My 1994 Cadillac DeVille with 4.9 liter engine had the check engine light come on.
I checked computer for codes and it came back PO39 and PO41. Both of these are power train/transmission codes from what I can find, but what I would like to know is if some of you technicians and guru's could give me a little insight into what exactly could be causing these codes and what to look for.
In other words, if this car came into your shop, where would you start and what would you be looking for?
Thanks in advance, really appreciate the help.