So guys I have a Opel Corsa D 1.2 petrol engine with egr bypassed mechanically, but not electronically, and the air filter to the panel. Around 2000 rpm wire of the gas, the car strattona, and I get error in the diagnosis of the mixture is lean.
I thought it was due to the oxygen sensor immediately after the filter, and I cleaned the svitol but nada, the problem ? remained. I soaked it in thinner, and has worked for a couple of days, then again the same problem, in demolition I recovered a sensor of another Opel, Tigra precisely, they have different codes, and in fact after a few metres the problem ? re-presented.
I noticed that by removing the plug from said sensor, the drive reads minus 40 degrees. I thought if it reads a low temperature, inietter? automatically ir? of gas, then I put it in the bike and did a test, are the 5-6 days that the car walking with the cable unplugged and it goes perfectly.
Which pu? be the problem? I wanted to check the lambda sensor, but it uses 2, I come from a car, a p? pi? old I do not know what can serve the second, and which of the two I should go check it out, I probably should proceed to trial.

PS having their hands an instrument diy air/fuel tuning very and very reliable, I decided to do a test, I connected it to the first lambda and light the first led of the good, so usually I ? seemed to be a confirmation of that detected in the control unit. Then release the gas all the leds light up, even those of the fuel mixture rich... but I think that is normal...

Thanks to all, and aiutatemiiiiiii