Volkswagen-GroupVolkswagen has revealed that 11 million diesel engines worldwide have discrepancies in their software that could lead to an emissions “deviation between bench test results and actual road use”.

The firm says it is “working intensely to eliminate these deviations through technical measures” – and has set aside a massive €6.5 billion to “win back the trust of our customers”.

The firm has thus warned investors that earnings and profits for the Group in 2015 will be adjusted accordingly.

To clarify, Volkswagen has added that new engines sold in the EU comply with EU6 emissions regulations and the software “does not affect handling, consumption or emissions”. The software doesn’t affect most other Volkswagen engines either.

The discrepancy is with the big-selling 2.0-litre TDI motor, sold in the US under the ‘Clean Diesel’ banner. It seems engines sold between 2009-2015 have ‘defeat device’ coding in the software that helps them pass air quality emissions tests.

This is what the EPA has detected and it seems Volkswagen has discovered this ‘discrepancy’ is present in the coding for most 2.0-litre TDI engines sold in that period.

“Volkswagen does not tolerate any kind of violation of laws whatsoever,” it added in a statement.

“It is and remains the top priority of the Board of Management to win back lost trust and to avert damage to our customers.

“The Group will inform the public on the further progress of the investigations constantly and transparently.”