[Hardware]

No lugar disso:

pawn Код:

if((newkeys == 1) && (IsPlayerInAnyVehicle(playerid)))
{
     OnPlayerCommandText(playerid, "/motor");
     return 1;
}

Coloque isso:

pawn Код:

if((newkeys == 32) && (IsPlayerInAnyVehicle(playerid)))
{
     OnPlayerCommandText(playerid, "/motor");
     return 1;
}