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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N47 and N57 Turbodiesel Engine / Drivetrain / Exhaust Modifications > Boost pressure OBD READER (BIMMERLINK)
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      03-02-2021, 08:26 PM   #1
Donnf08
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Boost pressure OBD READER (BIMMERLINK)

Hey guys! So I connect my OBDII to my car and load up BIMMERLINK, my boost pressure is always 14 psi even at idle.... I try other apps and they read the same. My digital vent gauge is the only gauge when plugged in reads a vacuum and boost pressure which I think is accurate. Has anyone dealt with these readers. Plus you canít even read oil temp...
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      03-03-2021, 09:15 AM   #2
andreigbs
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14 psi is atmospheric (ie, always present).

Just subtract 14 from whatever the number is when you're driving and on boost.
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      03-04-2021, 03:40 PM   #3
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I use OBDFusion if I want a real-time dashboard on my phone whilst driving, and/or want to do data logging.

Boost pressure displays as nominal (i.e. 0-1psi) at idle, and can even read as a negative value if the engine is in overrun i.e. engine braking. It is never displayed as 14psi at idle speed.

Max boost for the 30d is typically displayed as ~24psi.
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      03-04-2021, 06:39 PM   #4
Donnf08
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Quote:
Originally Posted by andreigbs View Post
14 psi is atmospheric (ie, always present).

Just subtract 14 from whatever the number is when you're driving and on boost.
Ahhhh!!!
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      03-04-2021, 06:40 PM   #5
Donnf08
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Quote:
Originally Posted by Watsey View Post
I use OBDFusion if I want a real-time dashboard on my phone whilst driving, and/or want to do data logging.

Boost pressure displays as nominal (i.e. 0-1psi) at idle, and can even read as a negative value if the engine is in overrun i.e. engine braking. It is never displayed as 14psi at idle speed.

Max boost for the 30d is typically displayed as ~24psi.
Awesome
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      03-05-2021, 03:55 PM   #6
andreigbs
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I've just updated the BimmerLink app and now it shows boost as nominal value.

Give it a try and see if it works. Coincidentally, my BimmerCode app updated as well.
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      03-11-2021, 01:03 PM   #7
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Quote:
Originally Posted by andreigbs View Post
I've just updated the BimmerLink app and now it shows boost as nominal value.

Give it a try and see if it works. Coincidentally, my BimmerCode app updated as well.
Awesome Iíll try it today. I just got back to north Chicago so Iíll go for a drive this afternoon
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