Beetle L4-1781cc 1.8L Turbo (APH) (1999)
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The slots or holes in probe body are blocked
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The probe vent hole in area of connecting wire is blocked
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The probe has been overheated (glazed)
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The probe has been damaged by leaded fuel
Checking oxygen sensor wiring for HO2S -G39-
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Remove inner plenum chamber cover, left:
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Connect test box VAG 1598/31 to control module wiring harness. The engine control module is not connected by this action.
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Remove protective cover -arrows- and separate 6-pin connector (black) -1- to oxygen sensor before catalyst -G39-.