For all 2012 - 2016 AT owners, add this to your definition for the P0420 option:
On top:
Code:
<table name="(P0420) CAT EFFICIENCY BELOW THRESHOLD" storageaddress="11C224" />
(open the def with notepad++ search for P0390, paste below it)
Bottem:
Code:
<table type="Switch" name="(P0420) CAT EFFICIENCY BELOW THRESHOLD" category="Diagnostic Trouble Codes" sizey="1">
<description>CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD (BANK 1). To disable this DTC, make sure the box above is unchecked. Off-road use only.</description>
<state name="on" data="01" />
<state name="off" data="00" />
</table>
(again, search for P0390, paste underneath the </table>)
Does NOT work for 2017 AT