2003 Toyota 4Runner Q&A

2003 Toyota 4Runner Question: I have a chick engine light come up and the vsc track light,catlystic converter

Bank 1 was the code displayed when diagnose -
Answer 1
PO420 CODE? -
Comment 1
Yes. Actually this problem started when I change the plugs and one of the plug head had a crack and there was a misfiring when I was on the high way -
Comment 2
Need a scan test to view live data and pull any codes present. -
Comment 3
I did and came up with code 101tresh hole bank 1 -