Use LSU4.2

[Christian_Bylund]

Is it possible to use LSU4.2 wideband?
Just change the resistors to the values indicated in the CJ125 manual? or do you have to change something in the code too?
-R4 from 301r to 80r
-R6 from 31.6k to 10k.

H!

To be honest I have never tested with an LSU 4.2, never seen the reason for it. But according to the datasheet that is how you do it. Code should work without any modifications.

See sensor configuration in blue.

Replace R3 with 82.5 OHM resistor instead of 301 OHM.
Replace R6 with 10 kOHM resistor instead of 31.6 kOHM.

Please share your results.

[Christian_Bylund]

I changed the components, but the following message appears: CJ125: 0x283F

What would that error be?

Thank you for sharing your work with the LSU 4.2. This error is "Ext. heater - Short circuit to ground".
- Is your heating off?
- It also seems that the pins for LSU 4.2 are not the same as the LSU 4.9, is it connected correctly?

[Christian_Bylund]

When you connect the sensor it gets very hot and continues with this error.

Sensor can never heat up until 0x28FF is received from the CJ125 Diagnostic Register so why is it getting very hot? Can you please share a picture of your setup? It sounds like you have a constant supply to the sensor, it would also give this error.