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Chevrolet
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2001
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Cavalier LS, 2.2 4
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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 - 2.2L & 2.4L
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Inspection/Maintenance Procedures
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Inspection/Maintenance Heated Oxygen Sensor/Oxygen Sensor System Set Procedure (CNG)
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Conditions For Running
Conditions For Running
Engine must be operating on CNG.
Engine Coolant Temperature (ECT) is more than 160°F (70°C).
Engine must be running in closed loop fuel control
Engine must have been running for more than 2 minutes.