Posted by Phil Dunmore on April 16, 2007, 7:34 pm, in reply to "Oxygen sensor earth?"
Just read original post again and to clarify:- Yes it was a four wire. What I meant was a three wire would do the same job, so why did Skoda fit four wire. Hadn't cosidered the original sensor could be faulty and vehicle wiring or ecu. Always wary of two fault senario but it's possible. I earthed it on engine to reduce chance of earth potential problems, but doubt this ecu is that clever Still interested to know, if sensor body earth is correct, why it is done this way.