DTNA Base Engine Practice Exam

The coolant inlet temperature sensor is located on the oil/coolant module. This sensor plays a crucial role in monitoring the temperature of the coolant as it enters the engine, which is essential for managing the engine’s thermal efficiency and ensuring optimal performance. The data obtained from this sensor allows the engine control unit to make informed decisions regarding fuel injection, timing, and other parameters to maintain engine stability and performance.

Placing the sensor on the oil/coolant module provides a direct assessment of the coolant temperature before it circulates through the engine components, allowing for accurate readings that impact engine management strategies. This is vital for preventing overheating and ensuring that the engine operates within its designed temperature range, which enhances longevity and efficiency. Other potential locations like the cylinder head, radiator, or turbocharger do not provide the same level of insight into the coolant's initial temperature before it interacts with engine components, making the oil/coolant module the most appropriate choice for the sensor's placement.