car shuts off when put into drive on 2000 Pontiac Grand Prix GTP

My son was driving his car and it shut off. He can start it but once he puts it into drive it shuts off. He had it towed and a mechanic told him he needs a new engine. Does this seem right? Please help!! THanks. I know nothing about cars. I told him he should get a second opinion before he decides what to do.

by in Charlestown, RI on September 11, 2010
Get Your Car Fixed at a RepairPal Certified Shop.
We certify shops based on expertise, quality work, and verified customer reviews
1 answer
ANSWER by , October 04, 2010
Sounds like a security problem to me. Try another Key