Ok but in the manual it says 15-20V and not mentioning about that it would be to high for the sensor. The kit is about one year old and sad to need a new sensor that soon.

I use a laptop power supply with about 19V connected to the shield.
The wires looks good, I also measured the voltage and it was about 19V.

Hi I have a problem with lambda shield 2 with original Bosch sensor.
The system was working fine but suddenly stops reporting.
When I check the serial monitor I receive error code 0x287F (no sensor connected) is there any way to troubleshoot it or is it possible that the sensor is dead?