Jetta Sedan L5-2.5L (CBTA) (2009)
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Disconnect the Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) (G130) electrical harness connector.
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Switch the ignition on.
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Using a multimeter, check the Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) (G130) electrical harness connector
terminals 3 to 4 for voltage.
Specified value: 0.400 to 0.500 Volts
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Switch the ignition off.
If the specified value was obtained:
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Replace the Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) (G130).
If the specified value was not obtained:
Checking wiring
If the manufacturers test box is being used, perform the following step.
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Install the test box.
If the manufacturers test box is not being used, perform the following step.
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Remove the Engine Control Module (ECM) (J623). Refer to --> [ Motronic Engine Control Module, Replacing ] .
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Using a multimeter, check the Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) (G130) electrical harness connector
terminals to the Engine Control Module (ECM) (J623) electrical harness connector T121 terminals for resistance.
Specified value: 1.5 ohms Max.
If the specification was not obtained:
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Check the wiring for an open, high resistance, short circuit to each other, Battery (+), and Ground (GND).
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Check the electrical harness connector for damage, corrosion, loose or broken terminals.
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If necessary, repair the faulty wiring connection.
If no malfunction is found in the wiring: