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P0116OBD-II Code

Understanding Code P0116: Engine Coolant Temperature Circuit Range/Performance

Code P0116 indicates a problem with the engine coolant temperature circuit, which can affect engine performance. This article explores the common causes and implications of this diagnostic trouble code.

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Diagnostic Guide
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Diagnostic Information

The P0116 code signifies that the engine control module (ECM) has detected a range or performance issue with the engine coolant temperature sensor circuit. This can lead to incorrect temperature readings, impacting engine efficiency and performance. Common causes of this code include a faulty coolant temperature sensor, an air pocket in the cooling system that causes erratic readings, damaged wiring connected to the sensor, a thermostat that is stuck open leading to slow warm-up times, or low coolant levels. Addressing these issues promptly is crucial for maintaining optimal engine performance.

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