lambda errors now :(

[roboblob]

I ran my vagcom on the car tonight and these popped up , should I worry car seems fine with normal fuel consumption.

VCDS-Lite Version: Release 1.0
Control Module Part Number: 4D0 907 551 M
Component and/or Version: 2.8L V6/5V MOTR AT D02
Software Coding: 04153
Work Shop Code: WSC 00681
2 Faults Found:
16538 - Oxygen (Lambda) Sensor B2 S1: No Activity
P0154 - 35-10 - - - Intermittent
16518 - Oxygen (Lambda) Sensor B1 S1: No Activity
P0134 - 35-10 - - - Intermittent