![]() This error code may show up from time to time, or the Check Engine light may be triggered constantly. ![]() Knock sensors are generally bolted or threaded in the engine block. If the knock sensor malfunctions, and shows that it always knocks, the embedded computer in the vehicle will respond by changing the timing of the engine’s ignition system. The vehicle’s computer uses this information to tune the engine and it keep from “knocking”. This “knocking” is characterized by explosion of the air-fuel mixture, which delivers less power and can ultimately damage the engine in the long run. The job of the Knock Sensor is to send a message to the engine computer should one or more engine cylinders “knock”. DefinitionĮrror Code P0325 refers to a problem in the vehicle’s Knock Sensor Circuit. This can mean the readings are too low, too high, erratic, malfunctioning or anything beyond its normal operational window. Error Code P0325 is described as Knock Sensor Circuit Malfunction, which means problems with the readings from #1 Knock Sensor Circuit.
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