Hello! After a check, I had the error from the first picture. I replaced the spark plug with number 3, the one with the sensor.  Now, when checking on the tester, I get the error in picture 2. Does anyone know what needs to be done? Kodiaq 2.0, 2018 

The first picture is confusing me. As you have replacd the spark plug on cylinder 3, I assume that it is a petrol car. As such I thin it is doubtful whether it is fitted with glow plugs!

I specified, 2.0, Diesel, one of the 4 spark plugs is with a sensor, the third! 

@BogdanDDB In your original post you omitted any reference to 'Diesel' and incorrectly referred to 'spark plugs' - if you have diesel, you actually have glow (not spark) plugs.