Lambda probe defective?!

Hello, dear ones,

After a long time of silent reading, I report again today with a problem:

In the error memory I have:
17524 - Lambdaprode Bank 1 probe 1 heating circuit interruption
16518 - Lambda probe Bank1 probe 1 no activity (sporadic)
(as well as 17549 - checksum: Unplausible value)

The probe heater Bank 1 shows no resistance (measuring block group 41: (empty) "Hzg. vk. A.A.

I checked the voltage supply of the probe heater at the 4pin plug connection in the engine compartment; voltage is available and seems to be in the right position.

Does this mean that you can switch probes or are there other options?

Thank you very much.
Winfried