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(888) 312-8812 Login SignupThe Paccar Coolant Temperature Sensor monitors temperature changes within the cooling system and communicates that information to vehicle controls. As the coolant warms and cools, the sensor reacts by changing its output signal. This feedback helps the system respond to operating conditions during engine use. The sensor remains active throughout driving and functions automatically without adjustment. It is replaced during cooling system service when readings become inaccurate. The Paccar 1827058 operates continuously as part of the engine temperature monitoring process.
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