Scion 89615-52030 Knock Control Sensor

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Several fuel-related sensors can affect the ignition system, with the issues likely being the crankshaft position sensor, camshaft position sensor, and knock sensor. The knock sensor detects pinking, a phenomenon that occurs when the engine runs on low-quality or low-octane fuel. It identifies vibrations caused by pinking and alerts the ECU to delay ignition timing until it stops. The knock sensor can be removed by taking off the throttle body and inlet manifold. Then, disconnect the wiring plug, and unscrew it from the engine. Proper torque is crucial when refitting the sensor for optimal functionality.

The remainder of the installation is the reverse of removal. After that, refill the cooling system and check for leaks.