2007 Toyota 4 Runner Knock Sensor Location . Wondering if it could be knock sensor and what is the function of a knock sensor. After a few seconds to a minute, the super rough running engine smooths out but light stays on. OT mechanics - problem with my 89 toyota pickup *pics ... (Corey Johnson) A knock sensor is threaded into the engine block and is supposed to sense when the engine starts to ping or spark knock and reduces the ignition timing accordingly. Find aftermarket and OEM parts online or at a local store near you. The manufacturer states throttle body and the intake manifold must be removed to access the knock sensor. The knock sensor now exposed is the only wire going to the engine block in this location. The knock sensor is located on the side of the engine. early 3vze knock sensor wiring identification - YotaTech ... Toyota Knock Sensor Parts at Discount Prices ...