Polo 1.4 cat error
Good morning, I have this Polo 1.4 chassis WVWZZZ9NZ6D008809 with Marelli system gives me in diagnosis error p0420 and the probe does not work and gives me a fixed value of 0,44mv. The probe is new and I wanted to test the continuity of the wiring but I need the diagram, but if you have other ideas I accept them. Thanks Marco
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