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The tests that can be performed on a 4-wire Oxygen sensor are explained, very simple tests that will allow you to assess its condition. The sensors were taken from a 2001 Dodge Dakota with a 3.9 Lts engine, which was faulty (jerking, loss of power) with Codes P0132 and P0152. I hope this is of some use to you. GREETINGS, ILLUSTRIOUS YOUNG PEOPLE!!