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Chevrolet
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2002
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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 Control System Self-Diagnostics - 3.4L
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Inspection/Maintenance Procedures
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Inspection/Maintenance Heated Oxygen Sensor/Oxygen Sensor (Ho2S/O2S) System Set Procedure
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Conditions For Running
Conditions For Running
Engine coolant temperature is more than 176°F (80°C).
Engine operating in closed-loop.
The engine has been running for more than 4 minutes.
Battery voltage is 10-18 volts.