McLaren’s challenge has been undermined as they have only managed to get one car home in each of their last three races.
Running second in Italy, Button was forced out with a fuel system issue, while in Singapore on Sunday a gearbox problem wrecked Hamilton’s hopes of a win in a race he was comfortably leading.
“It is affecting us in the constructors’,” said Button as McLaren trail Red Bull in the championship by 38 points.
“It is such a shame because the team in every other area are doing such a good job. But two failures in two races is not what McLaren are about, so we have to solve these issues and move forward.”