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Cinedany Cinedany is offline
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Posts: 7
Join Date: Sep 2021
Car: C300
Default C300 2016 w205 jb4 , limp mode underboost CODE - 09-21-2021, 08:26 AM

I finally got my jb4 installed , when I select any map I get a undeboost error code , any ideas I only got the tmap plugged in, on the guide it says the manifold pressure sensor is optional , any ideas? Is it the other sensor coming out from the jb4 or a possible boost leak?
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