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Pontiac
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2001
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Sunfire L4-2.2L VIN 4
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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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Testing and Inspection
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Initial Inspection and Diagnostic Overview
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- Bi-Fuel/Alternative Fuels
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Vehicle On-Board Diagnostics (Accessing and Clearing Codes)
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Scan Tool Data Definitions
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NGO Signal Command
NGO Signal Command
Display shows GASOLINE or ALT. FUEL. This display monitors the AF ECU NGO Enable circuit output driver. Alternative fuel operation is requested when the AF ECU grounds the NGO Enable circuit to the gasoline control module.