Dallas chip replacement to fix adaptives

[gkronberg]

Hi all
In my research about my 456 bank idling high +30% ish but under throttle appears okay ( see my other post )
I have heard / read that the Dallas chip can fix this
1. Is there 2 chips one for each bank ?
2. Has anyone replaced them and any comments
3. Is it easy to replace/ fit

Thanks

[gkronberg]

Thanks guys ..