P0237 Audi A3 2.0 TDI: Low Signal

Hi, I'm having a strange problem.
Vehicle: Audi A3 8PA, 2.0 TDI 140 hp (BMM), first registration: 09/2006.
Original VCDS Hex+CAN-USB and Hex-Net interfaces from PCI are available!
The vehicle has entered emergency mode, it's no longer accepting fuel, the glow plug indicator is flashing, and the engine has stalled.

Error code:
VCDS version: DRV 26.3.0 is running on Windows 11 x64.
shop.dieselschrauber.org
Address 01: Engine Control Module
Label file: DRV\03G-906-021-BMM.clb
Control unit part number: 03G 906 021 JH. Hardware: 03G 906 021 AB.
Part and/or version: R4 2.0L EDC G000SG 0131.
Encoding: 0000072
Operating number: WSC 30480 001 1048576
VCID: EE9045F9F98AA2EFA1-80BA
2 error codes found:
000567 - Sensor for boost pressure (G31).
P0237 - 000 - Signal too low - Intermittent.
Environmental conditions:
Error status: 00100000
Error priority: 1.
Error frequency: 2.
Lost Count: 255
Mileage: 165,698 km
Time: 0.
Date: 2026.08.06
Time: 13:25:08
Environmental conditions:
Speed: 2352 RPM.
Speed: 124.0 km/h
Last: 0.0%
Voltage: 13.98 V
Binary value: 00101011
Pressure: 561.0 mbar
Pressure: 1275.0 mbar
005522 - Altitude sensor / Boost pressure sensor.
P1592 - 000 - Implausible relationship - Intermittent.
Environmental conditions:
Error status: 00100000
Error priority: 1.
Error frequency: 1.
Lost Count: 255
Time: 0.
Environmental conditions:
Speed: 0 RPM.
Speed: 32.0 km/h
Pressure: 254 mbar.
Pressure: -256 mbar.
Binary value: 00011010
Pressure: 958.8 mbar
Pressure: 693.6 mbar.
Readiness: 1 1 0 0 0

After the engine stall, it restarted, but then stalled again after a few meters.

At home, I replaced the G31 with an original part.
Mass points cleaned and resealed, cable harness (1KD 971 658) installed.

"So far, it runs, but when you demand power, it reverts to limp mode and shuts off. The only error code stored is 'G31 signal too low.' The turbo and DPF were replaced about 40,000 km ago. I've pressure-tested the charge air system and also tested it with a smoke generator, and it's perfectly airtight."

Well, I guess we're left with the MSG, or what do you think?

Here's a log from MWB 7, 10, and 11 (unfortunately, it only works in second gear).
https://drive.google.com/file/d/10Y0rhzSwhssuI6BFtgf4v55suJw_MRIn/view?fbclid=IwY2xjawUBfxdwZG9mAWV4dG4DYWVtAjEwAGJyaWQRMFJoQzUxSGRLQkgwcmF6VTFzcnRjBmFwcF9pZBAyMjIwMzkxNzg4MjAwODkyAAEeHANmLZEfLblwN3R3riaE1yiIj7h4Y5Q3lbvN9fdLYNhGnog_Ya5aplGrW6A_aem_EidFM67gfyGVRFSvMpvi6Q

I'm grateful for any help!