Jetta Sedan L5-2.5L (CBTA) (2009)
Start diagnosis
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Remove the engine cover with air filter.
Checking internal resistance
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Disconnect the Heated Oxygen Sensor (HO2S) (G465) electrical harness connector.
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Using a multimeter, check the Heated Oxygen Sensor (HO2S) (G465) terminals 1 and 2 for correct resistance.
Specified value: 2.5 to 14.0 ohms (at approx. 20 °C)
If the specification was not obtained:
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Replace the Heated Oxygen Sensor (HO2S) (G465) 20.
If the specification is obtained:
Checking voltage supply
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Turn the ignition switch ON
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Using a multimeter, check the Heated Oxygen Sensor (HO2S) (G465) electrical harness connector terminal 1 to engine ground for voltage.