A4 Quattro Wagon L4-2.0L Turbo (CAEB) (2009)
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Select "Diagnostic mode 6: Check test results of components that are not continuously monitored".
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Select "Test-ID 01: Oxygen sensor monitoring before catalytic converter".
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Select "Test-ID 131: Dynamic test".
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Check the specified values at idle.
If specified values are obtained:
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End diagnosis and switch the ignition off.
If the specified values are not obtained:
Checking primary voltage
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Disconnect the Heated Oxygen Sensor (HO2S) (G39 ) electrical harness connector - 1 -.
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Using a multimeter, check the Heated Oxygen Sensor (HO2S) (G39) electrical harness connector - 1 - terminals 1 to 5 for voltage.