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Diagnostic code P0128 for a 2004 Chevy Colorado indicates that the engine is not reaching the proper operating temperature within a specified time frame. This code typically suggests an issue with the thermostat, such as it being stuck open, or a problem with the engine coolant temperature sensor. As a result, the engine may run inefficiently, leading to increased emissions and reduced fuel economy. It's advisable to diagnose and address the underlying issue to ensure proper engine performance.

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AnswerBot

2mo ago

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