Non Mopar Mitsubishi issue

So my 17 year old niece has a 2003 Mitsubishi and it will not start or once in a while does start but all dash lights are on and then it stalls., For some reason I can't pull codes with a reader but the funny part is it will start and no dash lights on as long as the reader is plugged in? Whats up with that? Leave the reader plugged in and drive it

Ground issue? Code reader is making ground when plugged in. Pin 4 and 5 on the DLC are usually sensor/chassis grounds

What model Mitsubishi and engine?

Galant with the 3.6 I think

Tell her to cut her loses and find something else, I wouldn't wish an old Mistu on anyone. Had one years ago and it broke every 2 weeks. Worst cars on the road IMO

Turned wrenches for many, many years. Cannot argue that statement one bit!

Thanks! I'll check into that. She's just 17 and already into this car more than should be so just getting rid of it is not in the cards at this time