Jetta GLX V6-2.8L (AFP) (2002)
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The O2S sensor has been damaged by leaded fuel
Checking basic voltage for oxygen sensor 2
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Remove protective cover (arrows) and disconnect 4-pin harness connector (brown) -1 - to oxygen sensor after Three Way Catalytic Converter
(TWC) -G130-.
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Connect multimeter using auxiliary cables from VW1594 to measure voltage at terminals 3 + 4 (harness connector to Motronic Engine Control
Module (ECM)).
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Start engine and measure basic voltage.
Specified value: 0.400-0.500 V
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Switch ignition off.
If the specified value is not obtained:
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Check oxygen sensor wiring.
If the specified value is obtained:
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Replace oxygen sensor behind Three Way Catalytic Converter (TWC) -G130-. Refer to item 28 under "Fuel Delivery and Air Induction/Fuel
Injector", See: Fuel Delivery and Air Induction/Service and Repair
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Check DTC memory. If necessary, repair any malfunctions and erase DTC memory.
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Display readiness code.
If DTC memory has been erased or the Engine Control Module (ECM) was disconnected from permanent battery (B+) voltage, the readiness code
must be generated again.
Checking oxygen sensor wiring, oxygen sensor 2
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Remove wiper arms and plenum chamber cover.