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raoul_tiesto 5/25/2012P0330 - Knock Sensor
The Knock Sensor detects engine knock and sends a voltage signal to the ECM. The ECM uses the Knock Sensor signal to control timing.Its Located under the intake manifold bolted to the engine block.
Usually when a knock sensor its bad u gonna notice increased fuel consumption,ignition "" pinging"",and less power when accelerating.