2006 GTI K04, 6 codes, car barely runs

[clockwise33]

Before i start digging into it, anyone want to make a guess?

Friday,10,September,2021,17:02:05:39619
VCDS Version: Release 21.3.0 (x64) Running on Windows 10 x64
www.Ross-Tech.com

Address 01: Engine Labels: 06F-907-115-AXX.clb
Control Module Part Number: 1K0 907 115 B HW: 1K0 907 115 B
Component and/or Version: 2.0l R4/4V TFSI 0040
Software Coding: 0403010A18070160
Work Shop Code: WSC 08252 444 57356
VCID: 254A4903EC7BC5A390-8070
6 Faults Found:

000256 - Mass Air Flow Sensor (G70)
P0100 - 004 - Supply Voltage - Intermittent
Freeze Frame:
Fault Status: 00100100
Fault Priority: 0
Fault Frequency: 3
Reset counter: 255
Mileage: 204125 km
Time Indication: 0
Date: 2000.00.00
Time: 08:00:57

Freeze Frame:
RPM: 0 /min
Load: 0.0 %
Speed: 0.0 km/h
Temperature: 84.0°C
Temperature: 45.0°C
Absolute Pres.: 990.0 mbar
Voltage: 12.065 V

000568 - Manifold Pressure / Boost Sensor (G31)
P0238 - 001 - Signal too High - Intermittent
Freeze Frame:
Fault Status: 00100001
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 204125 km
Time Indication: 0
Date: 2000.00.00
Time: 08:03:13

Freeze Frame:
RPM: 0 /min
Load: 0.0 %
Speed: 0.0 km/h
Temperature: 52.0°C
Temperature: 42.0°C
Absolute Pres.: 1000.0 mbar
Voltage: 12.319 V

004243 - Bank 1; Fuel Measuring System 2
P1093 - 008 - Malfunction - Intermittent
Freeze Frame:
Fault Status: 00101000
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 204787 km
Time Indication: 0
Date: 2000.00.00
Time: 22:04:43

Freeze Frame:
RPM: 1467 /min
Load: 34.9 %
Speed: 0.0 km/h
Temperature: 63.0°C
Temperature: 21.0°C
Absolute Pres.: 990.0 mbar
Voltage: 14.351 V

008825 - Leak in Air Intake System
P2279 - 002 - - MIL ON
Freeze Frame:
Fault Status: 11100010
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 204800 km
Time Indication: 0
Date: 2000.00.00
Time: 22:21:25

Freeze Frame:
RPM: 784 /min
Load: 22.7 %
Speed: 0.0 km/h
Temperature: 85.0°C
Temperature: 33.0°C
Absolute Pres.: 990.0 mbar
Voltage: 14.224 V

009236 - Oxygen (Lambda) Sensor B1 S1 Voltage too Low / Air Leakage / Sample Error
P2414 - 008 - - MIL ON
Freeze Frame:
Fault Status: 11101000
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 204803 km
Time Indication: 0
Date: 2000.00.00
Time: 02:20:07

Freeze Frame:
RPM: 770 /min
Load: 21.6 %
Speed: 0.0 km/h
Temperature: 54.0°C
Temperature: 30.0°C
Absolute Pres.: 990.0 mbar
Voltage: 14.351 V

009766 - Linear Oxygen (Lambda) Sensor B1 S1 Pump Current Trim Circuit
P2626 - 004 - Open
Freeze Frame:
Fault Status: 01100100
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 204803 km
Time Indication: 0
Date: 2000.00.00
Time: 04:01:19

Freeze Frame:
RPM: 1486 /min
Load: 11.4 %
Speed: 29.0 km/h
Temperature: 60.0°C
Temperature: 27.0°C
Absolute Pres.: 990.0 mbar
Voltage: 14.351 V


Readiness: 0000 0001

 

[clockwise33]

Update: Cleared codes, drove around the block - only the O2 sensor codes came back. Replaced upstream O2 sensor with Bosch OEM replacement, problem solved.

 

[ROH ECHT]

That was a lot of codes. All others appeared before the O2 codes, but the frequency for them is just one. Could've just been a freak occurrence for them. Hopefully none of those others return. A long time ago I would focus on the earlier stored codes. But lately I write them all down or take a screen shot and then clear them to see which reappear...just as you did.

 

[clockwise33]

I'm pretty sure the MAF voltage and boost sensor codes were due to me messing with connectors and/or pressure testing the intake plumbing.