Red Bull is under investigation by the FIA this morning after technical delegate Jo Bauer reported that he found an engine mapping irregularity.
Rivals confirm that the matter clearly relates to off throttle blowing of the diffuser, which is not permitted this year.
A technical report from Bauer said: “Having examined the engine base torque map of car numbers 01 and 02 it became apparent that the maximum torque output of both engines is significantly less in the mid rpm range than previously seen for these engines at other events.
“In my opinion this is therefore in breach of Article 5.5.3 of the 2012 F1 Technical Regulations as the engines are able to deliver more torque at a given engine speed in the mid rpm range.
“Furthermore this new torque map will artificially alter the aerodynamic characteristics of both cars which is also in contravention on TD 036-11.”
The stewards are now considering the matter, who have the power to cancel the qualifying times of both drivers.
When this writer and a colleague told a surprised Horner of the FIA bulletin he said: “I’m not aware of any irregularities, and the result was declared after qualifying.”