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Pontiac
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2001
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Aztek Base, FWD
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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
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Inspection/Maintenance Procedures
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Inspection/Maintenance Heated Oxygen Sensor/Oxygen Sensor System Set Procedure
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Enable Criteria
Enable Criteria
Engine coolant temperature is greater than 176°F (80°C).
Engine in closed-loop.
Engine running for more than 4 minutes.
Battery voltage is 10-18 volts.