While his team-mate Sebastian Vettel shares the world championship lead with Mercedes' Lewis Hamilton after a win and a second place in the year's first two grand prix, Raikkonen is yet to get on the podium.
How Ferrari's other drivers cost Vettel shot at Chinese GP
His performances have already prompted Ferrari president Sergio Marchionne to urge team boss Maurizio Arrivabene to sit down with Raikkonen to discuss the situation.
Raikkonen admits he is unhappy with how his season has started, but believes making better set-up decisions can help him turn the corner.
"It's always painful when you don't have a good result," said Raikkonen, who was fourth in Australia and fifth in China.
"I've been in the sport long enough and it's not very often that it's all smiling and happy.
"It's a part of the job. It's frustrating. But I know what we need and we have a very clear picture of what we want to do."
Raikkonen's hopes of tuning his car more to his liking were not helped by Friday's running in China being a washout, but he says he cannot use that as an excuse.
"The not running on Friday was a bit of bad timing, but that's how it goes," he said.
"I'm confident that we can get where we want to be.
Read the full article on eurosport.co.uk: Raikkonen has plan to rectify 'painful' F1 start