So you are designing your own circuitry? I can ship to Sweden (from Sweden) so it's quite fast and you will then have a working reference to evaluate on. No I'm using yours (lambda shield 1.0) , andsince you circuit is getting feedback from the CJ125 about the temperature I would assume I could con...

Hi, I believe the CJ125 does not output UR as an analog reference of the temperature unless it detects a PWM input on the heater gate diagnostic pin (DIAHG). And probably the diagnostic register need to be 0x28FF. Check the block diagram and you will find the multiplexers. The temperature is a func...

So something strange is happening with my Lambda UR values, I have a constant signal of 860 +- 5 that does not change with temperature, even if I trick the program to heat the sensor.

Do you know what the UR output from the CJ125 is based on? Is it the reference resistor in the sensor?