Hello, I purchased a 2007 A4 B7 2.0 TDI a few months ago and the engine light just went on. Error codes are P2195, 008597. What does this mean??

Address 01: Engine Labels: 03G-906-016-BPW.clb
Part No SW: 03G 906 016 KN HW: 03G 906 016 KN
Component: R4 2,0L EDC G000SG 9748
Revision: --H05--- Serial number: XXXXXXXXXXXXXX
Coding: 0000072


Shop #: WSC 50571 136 87490
VCID: 79F90B6F302C89D6D3D-802C

1 Fault Found:
008597 - Oxygen (Lambda) Sensor B1 S1
P2195 - 000 - Signal too Low (Lean)
Freeze Frame:
Fault Status: 01110000
Fault Priority: 2
Fault Frequency: 1
Reset counter: 255
Mileage: 291693 km
Time Indication: 0
Date: 2064.00.00
Time: 00:00:00

Freeze Frame:
RPM: 1512 /min
Speed: 36.0 km/h
(no units): 63.0
Temperature: -3.6°C
Absolute Pres.: 969.0 mbar
Voltage: 3.066 V
(no units): 0.00

Readiness: 1 1 0 0 0