Longtube headers

[2015silveradotoast]

Just but longtube headers on 2015 silverado now have p020 and p030 codes used 02 sensor extenders anybody have any ideas on what I could be doing wrong?

[1SLOW1500]

Bank 2 value issue. Meter out you extension wires. I am very surprised you needed extensions. I freed mine and got so much length. You can also reset and see it the value corrects. 

[2015silveradotoast]

Tried all the easy fixes if you could give me a rundown of how you freed up the harness and is it possible with the headers still in it? That would be greatly appreciated @1SLOW1500