McLaren Honda's Jenson Button was left frustrated after brake problems hampered his performance in qualifying for the Spanish Grand Prix, although he did still make it through to Q2 for the first time this year.

Button will now line-up in 14th place on the grid on Sunday, alongside team-mate Fernando Alonso, who was just 0.094s quicker in the sister car.

"It was really frustrating because we put new brake pads on for qualifying, and every time I got to Turn 1 and braked, it massively pulled to the left. We need to look at the reasons for it," Button said.

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"I don't know what is going on with them. I had real big issues when I was hitting the pedal - the car was moving all over the place. It is very weird and then in the last run in quali the team said to warm them up in a different way, which is heavy braking, normally we are dabbing the brakes all the way round. I did that and it didn't pull to the left, but I hadn't warmed the tyres up [properly as a result] and just kept locking the fronts.

"It was a bit of a pain. I'd rather it just pulled to the left at Turn 1. But anyway we are in Q2 and that is a positive step for both of us."

Asked specifically about the brake issues, Button confirmed it was one of the front brakes that was the problem.

"It is not coming up to temperature. We don't know why. Hopefully it is something we can change for the race," he added.

"We have all the data to say it is not doing what it should do. At some point in the race it will be fine, but Turn 1 in the race could be very interesting as it is very aggressive how it pulls across..."

Meanwhile, looking to the race, Button believes the team is in better shape than it has been previously this season: "I think so, on Friday our pace was okay. I think everyone turns their engines up for qualifying and will probably have to turn it back down for the race. We don't have to. I am looking forward to it."

So can he score points?

"I really don't know where we are going to end up, but I am happy with the progress we have made this weekend. It is great to see in qualifying we can be 13th and 14th. The last race Fernando was in 14th, but a few other cars had problems. Now our pace has stepped forward, which is great. Hopefully we can put that to good use tomorrow and make the most out of what we have and if other people don't, then there is always the possibility of points, yes," concluded the 2009 F1 world champion.