2014 6.2 code
Fleet Mechanic
Joined: Dec 2016
Posts: 1,791
Likes: 524
From: Florida
Looks like it's a knock sensor code.
https://www.obd-codes.com/p06b6
EDIT: Also looks like I was posting at the same time. 
https://www.obd-codes.com/p06b6
When a code P06B6 is stored, it means that the powertrain control module (PCM) has detected an internal processor performance error with a certain knock sensor (designated 1) circuit. Other controllers may also detect an internal PCM performance error (with the knock sensor circuit) and cause a P06B6 to be stored.
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4wd Low
Joined: Jul 2015
Posts: 12
Likes: 2
From: nebraska
Update on code p06b6. I checked the engine compartment with it running. Found 1 spark plug boot on #3 cylinder arc against the block. Changed the boot and it seems to correct my problem.
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