Thanks.

I tried replacing the O² sensor unit and pressing the zero button,But unfortunately, there is no improvement.
The most important issue is that users cannot perform calibration operations privately.
I don't even know how to get into calibration(service) mode

I try to read the FM24CL64BG chip,It seems that the calibration information is not stored internally,I guess the calibration information should be stored inside the main chip LPC1857FET256

Attached Images
FM24CL64BG.zip (227 Bytes, 12 downloads)
SHA1: de11a0963339a9315763bed1696751785e5df1e5
Last edited by daisizhou; 30/12/24 6:35 AM.
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