A3 L4-2.0L Turbo (BPY) (2006)
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Disconnect the Engine Coolant Temperature (ECT) Sensor G62 electrical harness connector - arrow -.
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Using a multimeter , check the Engine Coolant Temperature (ECT) Sensor G62 terminals 1 to 2 for resistance.
Use the chart below for the specified values:
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Area A: Resistance values 0 to 50 degrees C.
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Area B: Resistance values 50 to 100 degrees C.