Team boss Ross Brawn is optimistic his outfit will be able to fight on top at this weekend's Hungarian Grand Prix after what he has described as two frustrating races at Silverstone and Nurburgring.
Both the team and Jenson Button have seen their championship lead reduced as rival Red Bull has proved to be unmatchable in the last two events.
Brawn has been hindered by the low track temperatures, and Button has managed a sixth and a fifth places while Red Bull has scored two one-twos.
Brawn, however, insists the temperatures have played a big part in his team's lack of performance, and he is confident the warmer weather in Hungary will allow Button and Rubens Barrichello to fight back.
"The last two races at Silverstone and the Nurburgring have been frustrating for the team as we have not been able to achieve the full potential of our car at the same time as our competitors have taken a good step forward," said Brawn.
"However we are confident that the inherent performance of the BGP 001 which was demonstrated during the first half of the season has not disappeared and the problems that we faced were unique to the circumstances of those races.
"Our focus now is to maximise the performance that we know is in the car whilst continuing to develop improvements which will maintain our championship challenge.
"We have a significant aerodynamic upgrade for the race in Budapest which will bring performance gains in efficiency, downforce and aero balance but we face a fierce battle and we must continue to improve for the rest of the season.
"The team has faced many challenges to arrive where we are today and I am confident that we have the people and resources, plus two excellent drivers, to respond and fight to maintain our position of leading the Constructors' and Drivers' Championships."