EGT sensor fluctuating

[6.7 Powerstroker]

My 2011 f250 which had the long block replaced about 3 yrs/90k miles ago from Ford dealership, has recently thrown code P0128 which just went back off on its own. Today I noticed my aftermarket egt gauge fluctuating as seen in this video. I also noticed a small white cloud coming out the exhaust when I stomp it and that distinct orange coolant smell. Anyone know if this could be from a leaking intercooler or is it possible its coolant from a bad turbo seal (not sure if thats even possible)? The long block was replaced from Ford and I never dog this truck so I really doubt (hope) its not the head gaskets. Looking for some advce from experienced 6.7 mechanics on what to check and look for?

link

https://fb.watch/pqObCwd3Zi/?mibextid=Nif5oz

 

[lincolnlocker]

My 2011 f250 which had the long block replaced about 3 yrs/90k miles ago from Ford dealership, has recently thrown code P0128 which just went back off on its own. Today I noticed my aftermarket egt gauge fluctuating as seen in this video. I also noticed a small white cloud coming out the exhaust when I stomp it and that distinct orange coolant smell. Anyone know if this could be from a leaking intercooler or is it possible its coolant from a bad turbo seal (not sure if thats even possible)? The long block was replaced from Ford and I never dog this truck so I really doubt (hope) its not the head gaskets. Looking for some advce from experienced 6.7 mechanics on what to check and look for?

link

https://fb.watch/pqObCwd3Zi/?mibextid=Nif5oz

Pull the cold side ic pipe and see how wet everything is inside.