FIA race director Charlie Whiting reveals that Sauber's DRS problems from the weekend's Italian Grand Prix will be discussed at a meeting with the team's technical directors on Thursday.
Marcus Ericsson had a massive crash, which luckily he walked out okay from, in Monza - when the Swede lost control when braking due to his DRS flap not closing the way it should have.
Ericsson also had a DRS issue in Silverstone this season, where he also crashed.
Sauber did make a "small fix" that the FIA were fine with and then Renault's Carlos Sainz said that DRS was becoming dangerous.
Whiting is determined to prove Sainz wrong and to not have repeats of Ericsson's incident and has revealed that talks will begin on Thursday over the issue.
"We've got a technical working group meeting on Thursday, and we're going to discuss it," Whiting informed Autosport. "We checked a lot of DRS systems on the cars after qualifying, to make sure that none of them could do what the Sauber's did.
"Theirs effectively had a stop but the stop was easy to override, and it could go over the centre and when it closed - when the driver brakes or foes off the throttle above a certain threshold - it's slow to close because it has gone over the centre.
"They (Sauber) put these stops in to make sure it couldn't happen again."
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