New IAT sensor reading boost at idle

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jwilliams3527

Junior Member
Joined
Apr 5, 2022
Posts
13
Reaction score
1
Location
Birmingham, AL
Ram Year
2016
Engine
Cummins 6.7
I’m trying to track down a problem and decided I’d start with replacing the MAP, MAF and IAT. I replaced the MAP and MAF and all went as expected. I’m having to wait on the Mopar IAT sensor since I can’t find one local. I’ve tried two different sensors from two different parts houses and have the same result with both. After installation, when I turn the key to the on position without starting the truck, I’m seeing 5psi of boost on the dash gauge. When it happened with the first sensor I just assumed it was junk, but since they’re both doing it, I’m at a loss. Anyone seen this before?
 
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