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Chevrolet
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2003
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Impala Base, 3.4 E
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls Self-Diagnostics - 3.4L
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Drive Cycles
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Inspection/Maintenance Heated Oxygen Sensor Heater System Set Procedure
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Conditions For Running
Conditions For Running
The ECT sensor parameter is less than 90°F (32°C).
The IAT sensor parameter is less than 90°F (32°C).
Difference between ECT and IAT is less than 7°F.
Battery voltage is 10-18 volts.