Yeah, they only have details online for the 2014+, because that was when the diesel came out in the US. I'd guess it would be the same part number, but who knows. On the 2014 it looks like 5146662AB is the Catalyst Temperature Sensor, and 5146661AB is the EGT sensor (now replaced by the 5146663AC), going by this TSB:
http://www.wk2jeeps.com/tsb/tsb_wk2_1809415.pdf
Going by the error it is the Cat sensor you want, not the EGT.....