Operation CHARM
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Pontiac
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2000
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Grand Prix V6-3.1L VIN J
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Repair and Diagnosis
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Powertrain Management
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Computers and Control Systems
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Description and Operation
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System Operation
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PCM Controlled Warning Lamps
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Engine Oil Level Switch
Engine Oil Level Switch
The PCM monitors the Engine Oil Level Switch signal at start-up to determine if the engine oil is OK. If the PCM determines that a low oil level condition exists, it will illuminate the indicator lamp.