Need help diagnosing boost display fault
Thread Starter
Junior Member
Joined: Jun 2024
Posts: 22
Likes: 3
2017 e400 Estate
Need help diagnosing boost display fault
-pcv replaced, boost controller replaced, vacuum pump check valve replaced.
Where does the display get its input? Im assuming one of the sensors is toast.
https://youtube.com/shorts/Hq-qsB3NnJw?si=5jsoww3bPWKymOkE
Where does the display get its input? Im assuming one of the sensors is toast.
https://youtube.com/shorts/Hq-qsB3NnJw?si=5jsoww3bPWKymOkE
Super Member
Joined: Aug 2019
Posts: 594
Likes: 171
From: USA to Germany
W221/W222/W213/X290
-pcv replaced, boost controller replaced, vacuum pump check valve replaced.
Where does the display get its input? Im assuming one of the sensors is toast.
https://youtube.com/shorts/Hq-qsB3Nn...soww3bPWKymOkE
Where does the display get its input? Im assuming one of the sensors is toast.
https://youtube.com/shorts/Hq-qsB3Nn...soww3bPWKymOkE
It could be a couple of things. Obviously could be the actual turbo, but highly unlikely. Next thing to check would be for a faulty boost pressure sensor, MAP sensor issue (most likely), or a vacuum line leak.
What motor do you have? M274?
Thread Starter
Junior Member
Joined: Jun 2024
Posts: 22
Likes: 3
2017 e400 Estate
Do you have any active/stored codes? Have you plugged in a scanner?
It could be a couple of things. Obviously could be the actual turbo, but highly unlikely. Next thing to check would be for a faulty boost pressure sensor, MAP sensor issue (most likely), or a vacuum line leak.
What motor do you have? M274?
It could be a couple of things. Obviously could be the actual turbo, but highly unlikely. Next thing to check would be for a faulty boost pressure sensor, MAP sensor issue (most likely), or a vacuum line leak.
What motor do you have? M274?
No codes. I run logs for all the sensors and there doesn't seem to be any anomaly data in the MAP readings during these occurrences...also only happens when engine is cold ish.... could it be a cropped out airbox map? Thats my next contestant on the price is right....
Oh ya and i checked for vacuum leaks with mighty vac...nothing.
Super Member
Joined: Aug 2019
Posts: 594
Likes: 171
From: USA to Germany
W221/W222/W213/X290
Its an m276....turbos are fine. Just came back from the dealer who checked and replaced the pcv and the front main seal under warranty. They also recently swapped my evap purge valve under warranty.
No codes. I run logs for all the sensors and there doesn't seem to be any anomaly data in the MAP readings during these occurrences...also only happens when engine is cold ish.... could it be a cropped out airbox map? Thats my next contestant on the price is right....
Oh ya and i checked for vacuum leaks with mighty vac...nothing.
No codes. I run logs for all the sensors and there doesn't seem to be any anomaly data in the MAP readings during these occurrences...also only happens when engine is cold ish.... could it be a cropped out airbox map? Thats my next contestant on the price is right....
Oh ya and i checked for vacuum leaks with mighty vac...nothing.
