OpenLegislation

Division 2.4

United Kingdom

Original text. Later amendments are not shown.

In addition to the provisions of section 3.2.1 of Annex 11 to UN/ECE Regulation 83 the manufacturer may temporarily disable the OBD system in the following conditions:

  1. (a)

    For flex fuel or mono/bi fuel gas vehicles during 1 minute after re-fuelling to allow for the recognition of fuel quality and composition by the ECU;

  2. (b)

    For bi fuel vehicles during 5 seconds after fuel switching to allow for readjusting engine parameters.

The manufacturer may deviate from these time limits if it can demonstrate that stabilisation of the fuelling system after re-fuelling or fuel switching takes longer for justified technical reasons. In any case, the OBD system shall be re-enabled as soon as either the fuel quality and composition is recognised or the engine parameters are readjusted.