Mismatched hPa Readings Between PFD and Analog Altimeter in MSFS2024

Hello,

I’ve encountered an issue in Microsoft Flight Simulator 2024 where the hPa readings on the PFD and the analog altimeter differ significantly.

For example, even after synchronizing the barometric pressure using the “B” key, or manually adjusting it via the BARO knob on the PFD or the analog altimeter’s adjustment knob, the values do not match. Typically, the PFD shows a value around 70 hPa lower than the analog altimeter (e.g., 973 hPa on the PFD versus 1043 hPa on the analog altimeter).

To clarify, I have, of course, set the PFD to display hPa.

Am I misunderstanding something about how these systems should work, or is this potentially a bug? Any clarification or advice would be greatly appreciated.

Thank you for your time and assistance!

Best regards

msfs-2024

Which aircraft ?

These instruments in general are not coupled, you have to set them all for their own.

Some aircraft have options to set them in sync for Capt and FO,
but thats not how it in real works

In this case we talk about the 172 G1000 Cargo in career mode. Ingame those instruments are coupled, so it doesnt matter if I hit B or use the BARO knob on the PFD/MFD or the analog knob on the analog altimeter, both change.

Yes, I’ve experienced this in most of the default aircraft, but not the Fenix A320 weirdly, maybe they are pulling data from a different source? I think this started happening for me since the last patch, could be a bug.

Could this be what you are experiencing?

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It’s possible that the discrepancy is due to the way the systems process data. AFAIK in most aircraft, the Garmin (or equivalent) processes Baro data separately from the analog altimeter, as the PFD gets its data from an avionics computer while the analog altimeter directly reads from the static pressure source. This can cause mismatches, especially if there’s a calibration issue or a bug. The Fenix A320 might not have this issue because it likely pulls data from a unified source. If this started after the last patch, it does sound like a potential bug.

Trust Nixon to have already found this, respect good Sir. :+1:

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Yeah this looks like the same issue. I couldnt verify the BARO in the weather setting since I am using carreer mode only at the moment. I noticed that when ATC gave me the QNH and I set it up on the analog altimeter just to get a message from ATC that I am 300ft high and to decrease to FL80. So I checked the PFD that was in inHg, changed it to hPa and then noticed the difference.

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Atc is often telling me I’m 300ft high or low of assigned altitude even when I adjust based on the setting they provide … don’t know why it’s always that number or much about your problem but I’m guessing the source problem is the same

did you try setting the BARO with the knob on the PFD or with the analog altimers knob?

Yea, It’s the case for all steam gauge aircraft. I raised a bug report about the inability to accurately set QNH a few weeks ago. Initially with the first release or 2024 the problem was somewhat intermittent and the gauge would suddenly correct itself mid flight sometimes resulting in an altitude correction/discrepancy of several hundred feet. Following the first update the problem has been permament making flying purely steam gauge aircraft a no no for me which is a big let down as I generally prefer them to glass cockpits.

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I guess just the pfd… left the analog at standard but it seemed to be at the correct relative altitude to the pfd accounting for the baro difference