Ace,

I looked into this for you, and AUTOWEB has a page of people just like
you with the Gearbox Fault. Unfortunately, nothing I found spoke of
finding the solutuion to the problem.

So.....<rubbing crystal ball> I have an "educated <depending who you
talk to> guess" for you. Its the crankshaft sensor. Now days one can go
down to a good parts house and rent an OBDII scanner and retrieve any
codes. I suspect that the crankshaft sensor code will be present.

FWIW,
Blake