I have a 1997 xj6 with 225,000 miles... my obd2 shows a misfire in cylinder 1,2,4.. it also shows a fault in p1313 and p1314.... I have switched the cylinder I too 6, the obd 2 reading showed know change. I also switched out the spark plugs.there was know change in the misfire reading. I about to research p1313 and p1314 any thoughts

 

DTC P1313 is Catalyst Damage Bank 1; DTC P1314 is Catalyst Damage Bank 2.

Find and repair the misfire(s) and do not operate the vehicle under conditions that cause the MIL to flash.

You should also post your enquiry in the X308 forum, this is the forum for the XJ6 from 1968 to 1987.