This was in the new threadzilla yesterday:
More info on the possible modifications, from the EPA docs.
For Gen 1:
Quote:
3.2.1 Require the installation of a new exhaust flap, EGR filter, and NOx Trap
that meets the specifications of BASF TEX2064, as proposed by Settling Defendants to
EPA and CARB on January 28, 2016, or, subject to EPA/CARB approval, such other
functionally and effectively equivalent hardware or software, provided that Settling
Defendants propose such other hardware or software in the applicable Proposed
Emissions Modification.
For Gen 2:
Quote:
3.3.1 Require that the SCR system is capable of detecting the presence of
mostly to entirely water (less than 1% DEF) in the DEF tank and initiating Inducements
based on such detection. Settling Defendants must describe all Inducement strategies and
such Inducement strategies must be consistent with the SCR Guidelines and the original
certification applications submitted by Settling Defendants.
For Gen 3:
Quote:
3.4.1 Require the future installation of OBD hardware and software to achieve
compliant SCR monitoring, including the addition of a Second NOx Sensor in a
Subsequent Service Action according to the mileage intervals and schedule described in
subparagraph 3.4.3 (i.e., full volume SCR system monitoring with a downstream NOx
sensor).
3.4.2 Describe the NOx sensor or DEF system capable of detecting poor
reductant quality, including emission and dilution detection levels, and how the vehicles
will detect poor quality DEF and initiate Inducements, and require the installation of such
strategies.
3.4.3 Require the installation of the Second NOx Sensor and a new DOC or
DOCs (if necessary to ensure compliant emissions performance for 150,000 miles)
according to the following mileage intervals and schedule:
i. If, in the Proposed Emissions Modification, Settling Defendants
demonstrate durability of the current DOC for 90,000 miles, then Settling
Defendants must install the Second NOx Sensor and the new DOC at
90,000 miles or by January 1, 2020, whichever comes first, in a single
Subsequent Service Action.
ii. If, in the Proposed Emissions Modification, Settling Defendants
demonstrate durability of the current DOC for 120,000 miles, then Settling
Defendants must install the Second NOx Sensor and the new DOC at
120,000 miles or by January 1, 2020 whichever comes first, in a single
Subsequent Service Action.
iii. If, in the Proposed Emissions Modification, Settling Defendants
demonstrate durability of the current DOC for 150,000 miles, then Settling
Defendants are not required to replace the DOC and must install the
Second NOx Sensor in a single Subsequent Service Action beginning in
the 4th quarter of 2017, to be completed by January 1, 2020.
