When I connect led tester to my L8 ecu and unplug Lambda sonde dont get any errors, but when I try to do Co adjust get 1 blink in 2 sec what means that is out of range. Same thing when i connect Lambda sonde...

When engine is started i get error 3+1 - Lambda sonde but in manual say that can be possibly "out of range" of adjustment. I try to adjust co screw but all the same...

Sone ideas?