Chevrolet Cobalt Service & Repair Manual: Engine Management

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Initialization Sequence The EBCM performs one initialization test each ignition cycle. The initialization of the EBCM occurs when the EBCM detects the there is a minimum of 500 RPM fro ...

Emission Controls

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Chevrolet Cobalt Owners Manual. Engine Oil Life System
When to Change Engine Oil This vehicle has the Engine Oil Life System, a computer system that indicates when to change the engine oil and filter. This is based on engine revolutions and engine temperature, and not on mileage. Based on driving conditions, the mileage at which an oil change is i ...