my brother in law has a 98 Mitsubishi eclipse A/T that won't change gear. he got the code p1768, with a computer, and the book he has doesn't have that code in it. he wants to know what he needs to fix. he said he can put it in park and reverse, but when changing the gears for drive (i.e. first, second, etc.) it's stuck in one of them and it won't change no matter where the shifter is