will the error code P1605 prevent the vehicle from starting

Question

engine cranks but will not start with the P1605 error code

Answer 1

HI there,

The only way this code would prevent the vehicle from starting would be if the computer can't tell it's in park. This could prevent the engine from cranking at all. If the engine is cranking and not starting, then it's a fuel or spark related issue causing the problem.