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What does the po128 error code indicate on the Chevy Malibu?
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3 answers
★ Top Answer
The P0128 code in your Chevy Malibu indicates that the coolant thermostat temperature is lower than the ideal level for efficiency. This could be due to various factors like a malfunctioning thermostat, a faulty coolant temperature sensor, or a continuously running radiator fan. The common culprit is usually the thermostat, which is a low-cost part and simple to replace, often resolving the issue. When changing the thermostat, it's important to also flush the engine block and radiator to prevent debris from adhering to the new thermostat.
More answers
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Replaced both the thermostat and temperature sensor but the error code persists and continues to affect the car's performance.
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If the coolant temperature does not rise to the correct operating temperature in the Chevy Malibu, this code will show up.
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