A3 L4-2.0L Turbo (BPY) (2006)
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Disconnect the Intake Air Temperature (IAT) Sensor 2 G299 electrical harness connector - arrow -.
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Using a jumper wire , connect the Intake Air Temperature (IAT) Sensor 2 G299 electrical harness connector terminals 1 to 2.
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Check the value indicated on the scan tool display.
If indication jumps to approx. 140 degrees C:
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End diagnosis and switch ignition off.
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Replace the Intake Air Temperature (IAT) Sensor 2 G299.
If indication remains at approx. -40 degrees C or -46 degrees C:
Testing if display approx. 140 degrees C:
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Disconnect the Intake Air Temperature (IAT) Sensor 2 G299 electrical harness connector - arrow -.
If indication jumps to approx. -40 degrees C or -46 degrees C:
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End diagnosis and switch ignition off.
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Replace the Intake Air Temperature (IAT) Sensor G42.
If the indication remains at approx. 140 degrees C:
Checking wiring
Add as a work step to the procedure where required.
If the manufacturers test box is being used. Perform the following step.
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Install the test box.