Document ID: chunk:federal_register_of_legislation:F2023C00229:reg:5:p30
Version: federal_register_of_legislation:F2023C00229
Segment Type: reg
Provision Reference: reg 5 (pt 30/36)
Character Range: 504358–507263

6.5.2.5.         The instructions shall specify that use of and refilling of a required reagent of the correct specifications when indicated is mandatory for the vehicle to comply with the certificate of conformity issued for that vehicle or engine type.

          6.5.2.6.         The instructions shall state that it may be a criminal offence to use a vehicle that does not consume any reagent if it is required for the reduction of pollutant emissions and that, in consequence, any favourable conditions for the purchase or operation of the vehicle obtained in the country of registration or other country in which the vehicle is used may become invalid.

          6.5.3.             Engine system NOx control

          6.5.3.1.         Incorrect operation of the engine system with respect to NOx emissions control (for example due to lack of any required reagent, incorrect EGR flow or deactivation of EGR) shall be determined through monitoring of the NOx level by sensors positioned in the exhaust stream.

          6.5.3.2.         Engine systems shall be equipped with a method for determining the NOx level in the exhaust stream. Any deviation in NOx level more than 1,5 g/kwh above the applicable limit value given in table I of section 6.2.1 of Annex I to this Directive, shall result in the driver being informed by activation of the MI (see section 3.6.5 of Annex IV to Directive 2005/78/EC).

          6.5.3.3.         In addition, a non-erasable fault code identifying the reason why NOx exceeds the levels specified in the paragraph above shall be stored in accordance with paragraph 3.9.2 of Annex IV to Directive 2005/78/EC for at least 400 days or 9 600 hours of engine operation.

          6.5.3.4.         If the NOx level exceeds the OBD threshold limit values given in the table in Article 4(3) of this Directive (**), a torque limiter shall reduce the performance of the engine according to the requirements of section 6.5.5 in a manner that is clearly perceived by the driver of the vehicle. When the torque limiter is activated the driver shall continue to be alerted according to the requirements of section 6.5.3.2.

          6.5.3.5.         In the case of engine systems that rely on the use of EGR and no other aftertreatment system for NOx emissions control, the manu- facturer may utilise an alternative method to the requirements of paragraph 6.5.3.1 for the determination of the NOx level. At the time of type approval the manufacturer shall demonstrate that the alternative method is equally timely and accurate in determining the NOx level compared to the requirements of paragraph 6.5.3.1 and that it triggers the same consequences as those referred to in sections 6.5.3.2, 6.5.3.3 and 6.5.3.4.

          6.5.4.             Reagent control

          6.5.4.1.         For vehicles that require the use of a reagent to fulfil the requirements of this section,