# Commission Regulation (EU) 2017/1151 of 1 June 2017 supplementing Regulation (EC) No 715/2007 of the European Parliament and of the Council on type-approval of motor vehicles with respect to emissions from light passenger and commercial vehicles (Euro 5 and Euro 6) and on access to vehicle repair and maintenance information, amending Directive 2007/46/EC of the European Parliament and of the Council, Commission Regulation (EC) No 692/2008 and Commission Regulation (EU) No 1230/2012 and repealing Commission Regulation (EC) No 692/2008 (Text with EEA relevance), Division 4.2


Notwithstanding point 4.1, the manufacturer shall ensure that the accuracy is higher than – 0,05 and lower than 0,05 calculated with three decimals using the following formula:
Accuracy=Fuel_ConsumedWLTP−Fuel_ConsumedOBFCMFuel_ConsumedWLTP
Where:
Fuel_ConsumedWLTP (litres)is the fuel consumption determined at the first test carried out in accordance with point 1.2 of Sub-Annex 6 of Annex XXI, calculated in accordance with paragraph 6 of Sub-Annex 7 of that Annex, using emission results over the total cycle before applying corrections (output of step 2 in table A7/1 of Sub-Annex 7), multiplied by the actual distance driven and divided by 100.
Fuel_ConsumedOBFCM (litres)is the fuel consumption determined for the same test using the differentials of the parameter ‘Total fuel consumed (lifetime)’ as provided by the OBFCM device.
For OVC-HEVs the charge-sustaining Type 1 test shall be used.

---
Source: https://www.legislation.gov.uk/eur/2017/1151/annex/XXII/division/division/4./division/4.2 (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-1151/annex-XXII/division/division-4./division-4.2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.